Deeper Dive: Our Top Tested Picks
EDITORS’ NOTE
July 1, 2025: With this update, we swapped in the Lian Li A4-H2O as our Best Gaming Mini-ITX case, replacing the out-of-stock Fractal Design Torrent Nano. Since our last update, we have tested and reviewed more than a dozen PC cases for potential inclusion in our PC case roundups, but none of these models were Mini-ITX. We currently have six PC case reviews in the works from companies including InWin, Lian Li, NZXT, and Montech.
- Classic aesthetic, with improved usability and ventilation over first-gen Era
- Excellent dust filtration
- Full-exposure interior, including removable radiator rack
- Easier to build in than most Mini-ITX compact cases
- Pricey
- No major competitive performance advantage
We chose the Fractal Design Era 2 as our best general-appeal Mini-ITX case pick because the company took the oh-so-promising, striking design of its somewhat flawed Era ITX predecessor, internalized user (and reviewer!) feedback, and ironed out almost all the wrinkles with some thoughtful engineering. Premium materials (including an aluminum body and a walnut top panel) pair up here with improved cooling, enhanced ventilation, and a mix of easy-assembly features for a simply spectacular case. It accommodates a variety of configurations and offers a satisfying build experience, too, thanks to Fractal’s typical clear instructions and well-labeled accessory kit.
Looking to build a powerful, small-form-factor PC? This case will thrill you if you appreciate a sleek, modern aesthetic, clever craftsmanship, and high-quality materials. It’s not the cheapest Mini-ITX option on the market, by a long shot, but Mini-ITX gear always carries a premium, and your case is not the item to skimp on if you’ll be filling it with premium parts. This one will do them justice.
Motherboard Form Factors Supported
Mini-ITX
Internal 2.5-Inch Bays
4
Front Panel Ports
USB 3.2 Gen 2×2 Type-C, USB 3.2 Gen 1 Type-A (2), HD Audio
Side Window(s)?
No
PCI Expansion Slot Positions
3
120mm or 140mm Fan Positions
4
120mm to 200mm Fans Included
2
Maximum GPU Length
326 mm
Maximum CPU Cooler Height
70 mm
Power Supply Maximum Length
200 mm
Power Supply Form Factor Supported
SFX
Power Supply Mounting Location
Front
Internal Chassis Lighting Color
None
Included Fan Lighting Color
None
Dimensions (HWD)
12.4 x 6.5 x 14.4 inches
Weight
10.1 lbs
Learn More
Fractal Design Era 2 Review
- Compact size, but with room for large graphics cards and lots of drives
- Room for 240mm liquid-cooler radiator
- Seldom-seen support for 5.25-inch drives
- Requires measured approach to PC building, and installing components in logical order
Want impressive capacity to house high-performance components in a compact, affordable chassis? The Sugo 14 can do all that: Gather up your full-size ATX power supply, large graphics card, and even up to a 240mm liquid cooler. You’ll have to plan out your assembly carefully, especially if you’re a beginner PC builder. But the $109.99 MSRP (you may find it even cheaper on sale) and the ability to accommodate some full-size parts (which tend to be cheaper) make this a strong choice for building a powerful system that’s both compact and a carefully constructed value. It even has a seldom-seen 5.25-inch bay, if you’re an optical-drive holdout.
Savers and savvy builders! If you’re someone who values flexibility in your build and needs a case that can accommodate high-end components, this case is an very good choice. It’s particularly well-suited for medium-experience and expert DIY-ers seeking to maximize power and storage (and their money!) within a small form factor.
Motherboard Form Factors Supported
Mini-ITX
External 5.25-Inch Bays
1
Internal 3.5-Inch Bays
2
External 3.5-Inch Bays
0
Internal 2.5-Inch Bays
3
Front Panel Ports
USB 2.0, USB 3.0, headphone
Side Window(s)?
No
PCI Expansion Slot Positions
3
120mm or 140mm Fan Positions
3
120mm to 200mm Fans Included
1
Maximum GPU Length
330 mm
Maximum CPU Cooler Height
182 mm
Power Supply Maximum Length
150 mm
Power Supply Form Factor Supported
ATX
Power Supply Mounting Location
Bottom
Internal Chassis Lighting Color
None
Included Fan Lighting Color
None
Dimensions (HWD)
9.72 by 8.46 by 14.49 inches
Weight
10.78 lbs
Learn More
SilverStone Sugo 14 Review
- Small footprint
- Supports triple-slot video cards
- High-quality aluminum panel construction
- Easy-access side panels with snap-on connectors
- Requires pricier SFX power supply
- No reset button
- Just one mounting point for 2.5-inch drives; no 3.5-inch drive support
Why is Lian Li’s A4-H2O is our favorite Mini-ITX case for gamers? Because it can host some serious power in a pint-size package. At just 11 liters, it’s tiny—but don’t let that fool you. This clever chassis, born of a collab with boutique maker DAN Cases, fits triple-slot GPUs and 240mm liquid coolers with smart internal layout and solid airflow. Its design supports high-performance gaming parts while staying under $150, even with the included PCIe 4.0 riser. Tight tolerances mean planning is key, but get the build right, and you’ll have a stunning, compact gaming rig that punches way above its size…and this case’s price.
This case is perfect for gamers who want a powerful Mini-ITX build without compromising on performance or GPU size. If you value great cooling and the ability to fit high-end components in a small, if not necessarily the smallest, form factor, this Lian Li is an ideal choice. It’s best for users who enjoy fine-tuning builds and aren’t afraid of careful part selection and painstaking install, especially around cooling and cable management. Put in the effort, though, and enthusiasts who appreciate boutique-style designs without the boutique price will find the A4-H2O a sleek, capable platform for a compact, no-compromise gaming machine.
Motherboard Form Factors Supported
Mini-ITX
External 5.25-Inch Bays
0
Internal 3.5-Inch Bays
0
External 3.5-Inch Bays
0
Internal 2.5-Inch Bays
1
Front Panel Ports
USB 3.2 Type C, USB 3.0, headphone, mic
Side Window(s)?
No
PCI Expansion Slot Positions
3
120mm or 140mm Fan Positions
2
120mm to 200mm Fans Included
0
Maximum GPU Length
322 mm
Maximum CPU Cooler Height
55 mm
Power Supply Form Factor Supported
SFX, SFX-L
Power Supply Mounting Location
Front
Internal Chassis Lighting Color
None
Included Fan Lighting Color
None
Dimensions (HWD)
9.6 by 5.5 by 12.8 inches
Learn More
Lian Li A4-H2O Review
- Superior cooling for its size
- Ultra-tight footprint
- Compatible with other iCUE devices
- Big-GPU vertical installation without a riser cable
- Support for very large radiators
- Slim RGB fans and an ARGB controller included
- Full cooling performance at high noise under load
- Cable management is tricky
- Expensive for its class
Got not much desk, but plenty of airspace above it? Corsair’s 2000D RGB Airflow gets you exceptional cooling performance that fits on a super-compact patch. Despite that small footprint, it lets you stuff in a large radiator and a big GPU, all while keeping the components cool under load. The thoughtful design, including slim RGB fans, an ARGB controller, and a design that enables vertical GPU installation without a riser cable, makes it a standout for high-performance, small-form-factor builds. (Plus, if you’re into Corsair’s iCUE component ecosystem, an iCUE version of this case has got you covered.)
This case is ideal for users who want to build a high-performance, compact PC without compromising on cooling efficiency or aesthetics. It’s perfect for enthusiasts who value advanced cooling but just don’t have the space for a tower, and are willing to invest in a premium case with integrated RGB features. Note: It’s worth the spend only if you have the high-end parts to fill it, and you appreciate a stylish, RGB-lit setup. But if that’s you, the 2000D RGB Airflow will light your fire.
Motherboard Form Factors Supported
Mini-ITX, Mini-DTX
External 5.25-Inch Bays
0
Internal 3.5-Inch Bays
0
External 3.5-Inch Bays
0
Internal 2.5-Inch Bays
2
Front Panel Ports
USB 3.2 Gen 2 Type-C, USB 3.2 Gen 1 Type-A (2), HD Audio
Side Window(s)?
No
PCI Expansion Slot Positions
3
120mm or 140mm Fan Positions
8
120mm to 200mm Fans Included
3
Maximum GPU Length
355 mm
Maximum CPU Cooler Height
152 mm
Power Supply Maximum Length
175 mm
Power Supply Form Factor Supported
SFX
Power Supply Mounting Location
Top
Internal Chassis Lighting Color
None
Included Fan Lighting Color
Addressable RGB
Dimensions (HWD)
18.0 by 7.9 by 10.7 Inches
Weight
9.2 lbs
Learn More
Corsair 2000D RGB Airflow Review
- Stunning, clean all-metal look
- Excellent flexibility for a mini-ITX chassis
- Accepts ATX, SFX, or SFX-L power supplies
- Capable of mounting single- or dual-fan radiators for liquid cooling
- Accepts long video cards if used with an SFX PSU
- Classy tempered-glass window and vertical GPU mount kits available
- Pricey when kitted out with its most attractive options
- Use of fiddly hex screws with some mounting rails
It’s a tad pricey, but we chose Streacom’s DA2 V2 as a top pick for its exceptional balance of form, function, and flexibility. The case offers a sleek, minimalist design, and the versatile interior space, based on a unique configurable-rail system, supports a wide range of hardware configurations. A choice of perforated metal (included) or glass (optional) side panels allows for the most effective cooling for powerful components, or a slick transparent look. (It’s your choice!) Plus, the premium aluminum build quality and ease of assembly contribute to its standout status. The DA2 V2 can even take a full-size ATX PSU if you configure the rails in certain ways and pick the right parts. Streacom also offers accessories such as alternate front-panel-port kits and a vertical GPU mount.
The DA2 V2 is ideal for users who prioritize both aesthetic appeal and flexibility in their builds. If you enjoy customizing and rearranging the interior of your PC without compromising on a clean, minimalist look, this case is for you. Enthusiasts who want high-end components in a high-quality small form factor chassis, step right up.
Motherboard Form Factors Supported
Mini-ITX, Mini-DTX
External 5.25-Inch Bays
0
Internal 3.5-Inch Bays
3
External 3.5-Inch Bays
0
Internal 2.5-Inch Bays
8
Front Panel Ports
USB 3.1 Type C
Side Window(s)?
Optional Accessory
PCI Expansion Slot Positions
1
120mm or 140mm Fan Positions
2
120mm to 200mm Fans Included
0
Maximum GPU Length
300 mm
Maximum CPU Cooler Height
145 mm
Power Supply Maximum Length
190 mm
Power Supply Form Factor Supported
ATX, SFX, SFX-L
Power Supply Mounting Location
Variable
Internal Chassis Lighting Color
None
Included Fan Lighting Color
None
Dimensions (HWD)
11.3 by 7.1 by 13.4 inches
Weight
8.6 lbs
Learn More
Streacom DA2 V2 Review
- Compact footprint
- Can work in vertical or horizontal orientation
- Extra-heavy aluminum panels
- Configurable handles
- Flatpack DIY design is a fun project in itself, beyond the PC build
- Pricey
- Difficult to access mainboard for servicing after the build is done
- Wide-open top-panel I/O
- High GPU temperatures in our thermal testing
It’s not cheap, but you won’t see another PC case out there anything like InWin’s POC One. (Unless you’re looking at the company’s original POC, of course.) Its unique DIY assembly experience, out of a pizza-style flat box, adds a fun twist to building a PC. The case’s compact design allows for both vertical and horizontal orientation, and it comprises heavy-duty aluminum panels for durability, attached to the other portions by clever metalwork and flexible hinges. While it may not be the most practical option for every build, its innovative flatpack design and semi-industrial aesthetic set it apart in a market flooded with more conventional cases. It looks like nothing else.
The POC One is perfect for PC builders who appreciate the process as much as the end result. If you enjoy unique, hands-on projects (or maybe want to turn your build into a fun activity to do with the kids) and are drawn to cases with a distinctive look, this case is ideal. It’s also well-suited for those who want their PC to double as a conversation piece, and who aren’t intimidated by some potential challenges with component fitment and thermal performance.
Motherboard Form Factors Supported
Mini-ITX
Internal 2.5-Inch Bays
1
Front Panel Ports
USB 3.2 Gen 2×2 Type-C, USB 3.2 Gen 1 Type-A (2), HD Audio
Side Window(s)?
Yes (Plastic)
PCI Expansion Slot Positions
3
120mm or 140mm Fan Positions
3
120mm to 200mm Fans Included
1
Maximum GPU Length
335 mm
Maximum CPU Cooler Height
140 mm
Power Supply Maximum Length
200 mm
Power Supply Form Factor Supported
ATX
Power Supply Mounting Location
Side
Internal Chassis Lighting Color
None
Included Fan Lighting Color
Addressable RGB
Dimensions (HWD)
16.2 by 8.5 by 10.3 inches
Weight
9.6 lbs
Learn More
InWin POC One Review
Best Mini-ITX Case for Builds Without a Graphics Card
In Win B1
- Inexpensive
- Clean, attractive design with small footprint
- Can be positioned vertically or lying flat
- 200-watt 80 Plus Gold power supply included in price
- Tinted-glass top hides wire clutter
- No support for PCI Express add-on cards
- Cabling is a squeeze
- Just one USB port on front panel
Got a Mini-ITX motherboard and mean to rely on the CPU’s integrated graphics? The B1 delivers exceptional value and a unique, space-age design at a low price. Its compact, oval shape and smoked-glass top not only add distinctive visual appeal but also cleverly hide the clutter inside. The inclusion of a 200-watt 80 Plus Gold power supply further enhances its value, making it an attractive option for budget-conscious builders. Despite that lack of space for any PCI Express add-on cards, the B1 stands out as a stylish, functional choice if you don’t need dedicated graphics hardware and are building a low-wattage basic PC for productivity work or media streaming.
The B1 is best suited for users looking to build a minimalist, media-centric, compact PC that they won’t want to hide. Its design makes it ideal for those who prioritize aesthetics and intend to put this PC in a prominent spot on a desk or on a shelf in a media cabinet. This case is perfect for those building a light-duty PC or a media center where integrated graphics will suffice, and who appreciate a sleek, modern look at an accessible price.
Motherboard Form Factors Supported
Mini-ITX
External 5.25-Inch Bays
0
Internal 3.5-Inch Bays
0
External 3.5-Inch Bays
0
Internal 2.5-Inch Bays
2
Front Panel Ports
USB 3.0
Side Window(s)?
Yes (Tempered Glass)
PCI Expansion Slot Positions
0
120mm or 140mm Fan Positions
0
120mm to 200mm Fans Included
0
Maximum GPU Length
0 mm
Maximum CPU Cooler Height
60 mm
Power Supply Maximum Length
0 mm
Power Supply Form Factor Supported
Proprietary (included)
Power Supply Mounting Location
Bottom
Internal Chassis Lighting Color
None
Included Fan Lighting Color
None
Dimensions (HWD)
4.3 by 11.9 by 9.4 inches
Weight
4.2 lbs
Learn More
In Win B1 Review
- Tempered glass on three sides
- Fairly easy to build in
- Awkward “rear” (actually, top) I/O panel placement
- No included RGB lighting in a case that screams for it
- Included fans are unlit
Want to see your PC’s parts from (almost) all sides? Thermaltake’s The Tower 100 stands out with its three tempered-glass panels and open-air design, making it a showcase piece for your components. Its relatively simple assembly process and ample visibility for internal components are the calling cards of Thermaltake’s The Tower series. Although The Tower 100 has some design quirks, such as the awkward “rear” I/O panel placement (it’s on top, actually), its unique aesthetic and ease of build justify its selection. Plus, it’s not very expensive for a Mini-ITX case (Mini-ITX everything tends to be pricey), and the color choices are a hoot.
The Tower 100 is ideal for users who want their PC build to be a visual centerpiece. Its design appeals to those who enjoy showcasing their components with minimalistic yet eye-catching flair. It’s best suited for PC builders who have a knack for adding their own RGB lighting and who are comfortable with cable routing and hiding. If you’re looking for a case that blends form and function with a bit of an artist’s challenge, consider a stay in The Tower.
Motherboard Form Factors Supported
Mini-ITX
External 5.25-Inch Bays
0
Internal 3.5-Inch Bays
2
External 3.5-Inch Bays
0
Internal 2.5-Inch Bays
2
Front Panel Ports
USB 3.0 (2), headphone, mic, USB 3.2 Type C
Side Window(s)?
Yes (Tempered Glass)
PCI Expansion Slot Positions
2
120mm or 140mm Fan Positions
2
120mm to 200mm Fans Included
2
Maximum GPU Length
330 mm
Maximum CPU Cooler Height
190 mm
Power Supply Maximum Length
180 mm
Power Supply Form Factor Supported
ATX
Power Supply Mounting Location
Bottom
Internal Chassis Lighting Color
None
Included Fan Lighting Color
None
Dimensions (HWD)
18.2 by 10.5 by 10.5 inches
Weight
13.45 lbs
Learn More
Thermaltake The Tower 100 Review
- Ultracompact footprint of 6.1 by 8.3 inches
- Includes high-quality power supply and CPU cooler
- No space for larger CPU coolers
- Limited drive mounting space
- Front-panel connectors are a tight reach
The NCore 100 Max is a rare bird of Mini-ITX cases: You get a power supply and a CPU liquid cooler included and pre-installed in this thin sliver of a tower. Exceptional compactness and a comprehensive feature set are what you pay the premium for here. Measuring just 6.1 by 8.3 inches on your desktop, it efficiently minimizes footprint while still accommodating high-performance components, including thick graphics cards. The inclusion of a high-quality SFX Gold 850 ATX 3.0 power supply and a Cooler Master MasterLiquid 120L Core CPU cooler adds significant value. The thoughtful design and integrated components make the NCore 100 Max a top pick in its category, and it will save you part-selection and build time.
No desk space, no compromise, no problem! Seasoned builders and newcomers alike seeking a minimal desktop footprint from a PC without sacrificing performance, get in line. The NCore is especially well-suited for those new to Mini-ITX builds, as the included power supply and CPU cooler simplify setup. Enthusiasts looking to fit high-end hardware into a compact space will also appreciate its design, though it may not be the best choice for those needing to accommodate larger CPU coolers or lots of drives.
Motherboard Form Factors Supported
Mini-ITX
External 5.25-Inch Bays
0
Internal 3.5-Inch Bays
0
External 3.5-Inch Bays
0
Internal 2.5-Inch Bays
1
Front Panel Ports
USB 3.2 Gen 2 Type-C, USB 3.2 Gen 1 Type-A (2), HD Audio
Side Window(s)?
No
PCI Expansion Slot Positions
3
120mm or 140mm Fan Positions
2
120mm to 200mm Fans Included
2
Maximum GPU Length
357 mm
Maximum CPU Cooler Height
48 mm
Power Supply Maximum Length
130 mm
Power Supply Form Factor Supported
SFX
Power Supply Mounting Location
Top
Internal Chassis Lighting Color
None
Included Fan Lighting Color
None
Dimensions (HWD)
19.0 by 6.1 by 8.3 inches
Weight
13.8 lbs
Learn More
Cooler Master NCore 100 Max Review
- Three gorgeous tempered-glass panels that detach easily.
- Plenty of access for installing hardware.
- Two included fans.
- Classy design can hide or showcase your hardware depending on the latter’s lighting.
- The PSU (and other) cords extend from the top of the case.
- Fingerprint-prone.
A striking design and functional versatility make the Lucid LD03 our, ahem, clear pick for an all-glass chassis. Its three tempered-glass panels not only provide an elegant, modern aesthetic, but they also allow for a customizable view of your hardware, whether you prefer to highlight it (just add light!) or conceal it (or don’t). The case’s unique angular cuts and rounded edges contribute to its distinctive look while ensuring easy access for hardware installation and maintenance. Despite the Lucid’s compact footprint and the absence of built-in lighting or fan controllers, its superior build quality and design make it an appealing foundation for a Mini-ITX build.
The Lucid LD03 will appeal to users who value both style and functionality in a compact form factor. It’s a glassy canvas for those who want the flexibility to add their own lighting. This case is also well-suited for tech enthusiasts and system builders who appreciate a high-quality build but have more vertical space than desk area to spare.
Motherboard Form Factors Supported
Mini-ITX
External 5.25-Inch Bays
0
Internal 3.5-Inch Bays
1
External 3.5-Inch Bays
0
Internal 2.5-Inch Bays
2
Front Panel Ports
USB 3.0 (2), headphone, mic
Side Window(s)?
Yes (Tempered Glass)
PCI Expansion Slot Positions
2
120mm or 140mm Fan Positions
2
120mm to 200mm Fans Included
2
Maximum GPU Length
309 mm
Maximum CPU Cooler Height
190 mm
Power Supply Maximum Length
130 mm
Power Supply Form Factor Supported
SFX
Power Supply Mounting Location
Bottom
Internal Chassis Lighting Color
None
Included Fan Lighting Color
None
Dimensions (HWD)
16.3 by 10.4 by 9.1 inches
Weight
11.8 lbs
Learn More
SilverStone Lucid Series LD03 Review
- Very compact footprint, even for a Mini-ITX case
- Flexible component placement
- Can be oriented horizontally or vertically
- Supports large graphics cards
- Big coolers can interfere with power supply placement
- Assembly requires both advance planning and some dexterity
Open-frame cases, as a rule, employ singular designs, and we bet you’ve not met a chromed contraption like this one before. The eye-catching design of the Streacom DA6 XL is all about enabling a high-visibility Mini-ITX build, with its tubular-metal construction that maximizes exposure for internal components while staying sturdy. Don’t expect to install lots of drives, but know that the DA6 XL excels in thermal performance due to its completely open design. Flexible layout and customization options, based on a Streacom-specific mounting-rail system and modular port kits, make this funky case an appealing choice for DIY enthusiasts who seek a new challenge. There’s nowhere to hide your hardware and cables, with a case like this!
Aiming to transform your next PC-build project into a conversation piece? Streacom’s DA6 XL will give you and your guests plenty to talk about.
Motherboard Form Factors Supported
Mini-ITX
Front Panel Ports
USB 3.0 Type C
Side Window(s)?
No
PCI Expansion Slot Positions
3
Maximum GPU Length
358 mm
Maximum CPU Cooler Height
105 mm
Power Supply Maximum Length
185 mm
Power Supply Form Factor Supported
ATX
Power Supply Mounting Location
Top
Dimensions (HWD)
18.4 by 8.4 by 8.4 inches
Weight
5.8 lbs
Learn More
Streacom DA6 XL Review
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The Best Mini-ITX PC Cases for 2025
Compare Specs
Buying Guide: The Best Mini-ITX PC Cases for 2025
What Is a Mini-ITX Case?
The benefits of a Mini-ITX form factor PC are straightforward. Mini-ITX cases are smaller than the rest of the pack, and in some workspace or living-space scenarios, tiny is better by nature. In particular, a Mini-ITX PC is often the best option in offices where space is at a premium: say, as a laptop alternative for people working at common tables, or in cramped cubicles. (The pandemic tamped down that latter need, for sure, but plenty of us remain hybrid or home workers and have home offices that we wish were far less cluttered.)
Unlike chassis in the larger MicroATX and ATX sizes, many Mini-ITX PC cases can sit comfortably on desks, in niches, on shelves, or under a monitor without being obtrusive. Some are even designed to mount behind monitors or under desks to hide them from view. The Mini-ITX case isn’t bound by a strict size limit; what makes a case Mini-ITX is its support for the Mini-ITX motherboard form factor, and none larger. (More on that in a bit.)
It would be unwise to judge the potential of Mini-ITX PCs and cases solely by their size, though. The amount of processing power they can host doesn’t scale up and down 1:1 with the cubic volume. Indeed, much depends on the individual design. For example, today’s big, legacy-style ATX towers tend to allow plenty of space for stacks of hard drives or big liquid coolers that most PC users will never install. Most Mini-ITX systems allow you to install standard desktop motherboards and socketed desktop CPUs, and under the right conditions can be just as powerful as a kitted-out ATX tower.
Lian Li A4-H2O (Credit: Molly Flores)
That’s not to say you won’t find limiting factors—physics still applies. The major drawbacks to a Mini-ITX build lie in two main areas: the amount of interior space, which can limit what you can fit inside the chassis, and the thermals and cooling, which encompass the chassis ventilation, any fans installed (or that you can install), and the CPU and GPU you choose.
Let’s start with the space issue. Mini-ITX cases come in more unusual, one-off shapes and sizes than other kinds of PC cases, but their one unifying aspect is the class of the motherboard they accept. As noted earlier, the Mini-ITX form factor defines both a size class of motherboards, as well as the cases that fit those boards.
Raijintek Ophion Elite (Credit: Molly Flores)
Mini-ITX motherboards measure 6.7 by 6.7 inches, with mounting holes in prescribed locations; Mini-ITX cases, then, are built around accommodating these board dimensions. That said, some Mini-ITX cases are much bigger than others in terms of height or volume. But by definition, a “true” Mini-ITX case won’t accommodate any board bigger than a Mini-ITX one, with the exception of a few that also support the slightly larger (and uncommon) Mini-DTX form factor. Mini-DTX boards are slightly taller than Mini-ITX boards, at 8 by 6.7 inches. (The next biggest size class for motherboards, MicroATX, is 9.6 inches square and defines the next-largest class of PC cases.)
The compact nature of Mini-ITX cases and their associated motherboards usually doesn’t leave much room for other components, lots of drives or fans, big cooling gear, or other parts. Mini-ITX motherboards can house only two RAM DIMMs and a single PCI Express x16 add-on card. Depending on the design of the case, the PCI Express card support might be limited to a half-height, single-slot card, but many modern Mini-ITX cases can hold full-height, beefy dual- or triple-slot graphics cards without any issues. It all depends on the design, and that is why it pays to scrutinize a case’s specs (and read reviews) before buying.
The Limits of Power: Cooling Fans, PSUs, and More
A whole host of other variables also limit what you can and can’t put inside a Mini-ITX system. Some of them have nothing to do with the Mini-ITX case itself.
Take the Mini-ITX motherboard. Some are limited in how much power they can handle, or cap the power draw of the CPU you can install. Depending on the mobo, you may have a top allowable TDP rating of, say, 65 watts, though this is far from true for all Mini-ITX boards. Plus, to cool the CPU, depending on the chassis design, you may be forced to use a low-profile fan cooler similar to the small stock coolers that AMD and Intel provide with their mainstream desktop CPUs. In some cases, it’s possible to add larger air coolers, but again, this varies from one chassis to another.
A few Mini-ITX designs even accommodate modest all-in-one (AIO) style liquid CPU coolers with a small (usually 120mm or 140mm) radiator, but these are the exception. You’ll want to examine the case maker’s spec for the tallest CPU cooler the chassis can support; many Mini-ITX models do not have the vertical clearance for tower-style coolers. Knowing this measure will ensure that sure your cooler will sit comfortably clear of the case’s opposite side, and not interfere with other components. (Especially in Mini-ITX cases, you can have situations where the power supply or other components overhang the CPU cooler’s mounting area and limit the possible cooler height, and this may not be apparent from the outside.)
Why tall coolers don’t work in Mini-ITX cases (Credit: Joshua Gulick)
Likewise, pay attention to the maximum length, width, and (potentially) vertical height (full-height versus half-height) that the case allows for video cards. Depending on the card you have, or plan to get, that sizing may be a deal-maker or deal-breaker. Some of the smallest cases don’t support a video card at all, and if you intend to rely on your CPU’s integrated graphics, this can be a real space saver. (Know, though, that some chips, including some of AMD’s older mainstream Ryzen CPUs, and “F”-suffixed Intel chips, do not have an integrated graphics processor, and that your motherboard will need to have an appropriate video output.)
Then you have the power supply unit or PSU. Power-supply support is also not universal in the Mini-ITX form factor. Compact small-form-factor power supplies (dubbed SFX, and offered by major majors such as Corsair and SilverStone) are purpose-built for Mini-ITX cases, but not every Mini-ITX case accepts one. Some cases do squeeze in full ATX12V PSUs, which are larger-bodied. (The mounting face of an ATX PSU measures 5.9 by 3.4 inches, versus the 4.9 by 2.5 inches of an SFX one.) Some cases will instead have room to mount a standard ATX power supply, while a handful of models can use either type, with the smaller SFX PSU installation handled via an alternative adapter bracket or another hunk of hardware.
An SFX power supply (left) versus an ATX one (right) (Credit: Molly Flores)
You may also see support in a given case for a variant of the SFX form factor, called SFX-L. This is an offshoot, a slightly larger version of an SFX power supply with a longer body. (An ordinary SFX PSU measures 3.9 inches long, versus 5.5 inches for SFX-L.) The extra body size on an SFX-L supply allows for more and larger components and cooling hardware inside, in turn allowing for higher wattages. Don’t assume, however, that you can cram an SFX-L power supply into a case that only supports SFX PSUs. Look for that specific support.
To save space, an SFF power supply may seem like the best option for one of these systems, but they often cost more on a wattage-per-dollar basis than standard ATX PSUs and have lower power limits. (Current models top out at 1,200 watts, though that is way overkill for any reasonable and even most over-ambitious Mini-ITX PC builds.) ATX PSUs are the exact opposite, and using one of these instead will often make it possible to add more power-hungry components like the highest-end GPUs (if they will fit in the case to start with, alongside a full-size PSU). Whether your Mini-ITX case can house and cool that extra hardware is another matter. (Sometimes using an ATX PSU blocks part of the GPU space. Check those specs.)
The body of a modular power supply from Corsair (Credit: Joseph Maldonado)
Another factor in a Mini-ITX case is its PSU cabling. The cramped confines of a Mini-ITX case mean it is best to opt for a modular or semi-modular PSU design. These kinds of PSUs allow you to plug in just the power-cable “leads” you will use and leave the rest back in the box. Excess unused cable is the enemy in a Mini-ITX build—it blocks airflow and makes things look cluttered, especially in a case that might employ just the two main motherboard power feeds. (If you use onboard M.2 SSDs and no video card, those may be the only interior power cables you need!) A fixed-cabling PSU can saddle you with a giant knot of power leads you have no place to hide or stash.
Following that, airflow is often an issue for Mini-ITX cases, due to their reduced size. Components and cables stuffed into a smaller space can more readily block air from passing through the case with ease, and heat tends to build up more, as a result. These cases can also be an exercise in patience to work inside of, due to the care required in routing cables and installing components in a logical order given the space constraints. (That’s another point in favor of using a modular PSU in any Mini-ITX case.) But again, like almost everything else with Mini-ITX cases, this all varies widely from one case to another.
The Four Main Mini-ITX Case Types
At this point, the wide range of differences that can exist among a pool of Mini-ITX cases may seem daunting. You are probably starting to wonder how this can even be a single form factor at all. A form factor implies that it should be standardized, but in the case of Mini-ITX PC chassis, it’s mostly the motherboard size and shape that keeps this family a family.
In short, that means a Mini-ITX case can be just about anything—and they are. We’ve jokingly called Mini-ITX the least-standardized standard in PC building. That’s because these cases come in myriad designs on the outside, and you never quite know what to expect until you start to work on one on the inside.
To make looking over Mini-ITX cases more manageable, we’ve organized them into four rough design types. Not all Mini-ITX cases will fit into one, but most do, and this scheme gives you a solid idea of the options out there.
Style 1: The Horizontal Console Style
This flat design is what PC builders in years past often associated with home theater PC (HTPC) cases. Originally, most Mini-ITX cases used this design, but now it’s mainly used, where you see it at all, by OEMs. Still, a few models target end users, like the SilverStone Raven RVZ01-E, but as time has gone on, this design has fallen out of favor since many can’t host a full-size graphics card, and half-height graphics cards are a poor backwater for anyone needing graphics power.
In Win B1 (Credit: John Burek)
These cases tend to be among the most compact, with some designed to support a monitor sitting on top. They also tend to be easier than most to build in, as opening one large side of the enclosure grants easy access to all of the internal hardware.
The downside? They also have the most hardware restrictions. Most mandate low-profile coolers, half-height add-on cards (if any cards at all), and SFX (or even smaller proprietary) power supplies. This makes them a poor fit for gamers but an excellent choice for a moderate or light-duty work PC (or an HTPC) that relies on processor-integrated graphics.
Horizontal Style Mini-ITX Cases We’ve Tested
Style 2: The Pillar Style
This second style of Mini-ITX case stands out for having the smallest footprints; most of the gear inside is mounted vertically. Pillar cases are designed to stand up straight, obelisk-style, and not lie down. The internal layout changes considerably, and in some of these, you can fit a full-height graphics card standing on end.
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Corsair 2000D RGB Airflow (Credit: Joseph Maldonado)
The internal layout varies from model to model. These cases also tend to be the most restrictive in terms of parts-installation order, and some use unusual special hardware such as riser cables to make big video cards fit, or passthrough cables to position a power supply in an unusual spot. SFX PSUs tend to be the norm in these tightly packed cases.
Pillar-Style Mini-ITX Cases We’ve Tested
Style 3: The Shoebox Style
Now, what if you were to lay your pillar down? This third style uses a design that more closely matches a long, thin box.
SilverStone Sugo 14: Shoebox dimensions (Credit: Michael Justin Allen Sexton)
These cases aren’t all that tall and may look squarish from the front, but they tend to be long from front to back. Like the pillars, the main idea here is to fit a full-length video card.
Shoebox-Style Mini-ITX Cases We’ve Tested
Style 4: The Tiny-Tower Style
At first, you could easily mistake one of these cases for a larger MicroATX chassis. These are in fact smaller, however, and can’t hold a MicroATX board. This design isn’t as space-saving as most others, but it also means more room inside for hardware. The building process may be easier, too, given the extra interior.
Fractal Design Era 2 (Credit: Thomas Soderstrom)
For example, Fractal Design’s curvy Era ITX can hold ATX PSUs and standard-height graphics cards. It also has options for adding small AIO liquid coolers. And the Phanteks referenced below is essentially a scaled-down little tower.
Small Tower Mini-ITX Cases We’ve Tested
Ready to Buy the Right Mini-ITX Case for You?
The easy answer to what the best Mini-ITX case is? It comes down to the components you intend to install. For some shoppers, the look of the case tops everything, and that is fine. Just make sure to factor in some practical considerations, especially if you already own some of the parts.
The biggest one is whether you will (or will ever) install a video card. The absolute smallest Mini-ITX cases support no video card and assume your CPU’s integrated graphics will handle video output and acceleration. That factor will eliminate (or recommend) a whole swath of cases. Otherwise, look to the maximum video card length supported, as well as the number of lateral slots the card can occupy, and shop accordingly. Nvidia’s newest top-end RTX 40 Series cards are huge and some occupy three slots across; Mini-ITX cases are generally not their friend.
The second should be the number and kind of drives you intend to install. Most Mini-ITX cases support at least two 2.5- or 3.5-inch SATA drives, but factor in room for what you have. This won’t matter if you go all-in on motherboard-mounted M.2 drives, but most cramped Mini-ITX boards have room for just one or two of those.
The third is power-supply compatibility. If you are bringing a PSU you already own to the build, make sure it matches the type (ATX, SFX, or SFX-L) that the case supports and that it isn’t longer than the maximum rated length. While on the subject of measurements, make sure your CPU cooler and GPU will fit, as well; case makers supply those maximum heights and lengths. And remember that in some cases, a big PSU can block space allotted for a big GPU.
And so, onward to our picks. The selection we’ve made here isn’t a wholly comprehensive survey of every Mini-ITX case on the market, but we’ve reviewed a fair number and presented the best we’ve seen for the last few years. We’ll add and swap in the best new ones as they pass through PC Labs.
