Fitting a liquid-cooled, high-performance build into a desk-corner footprint is one of the most satisfying challenges in PC building. A 240mm radiator is the sweet spot for most builders: it cools a hot 65W to 120W CPU with headroom to spare, it fits far more chassis than a 360mm loop, and it keeps noise down compared to a big tower air cooler. The catch is that not every small case actually accepts a 240mm radiator — many “compact” designs top out at 120mm or force the radiator into awkward positions that starve your GPU of airflow.
We focused this roundup on cases where a 240mm AIO is genuinely supported, not just technically possible. That means radiator mounting points that make sense, GPU clearance that doesn’t disappear the moment you bolt a cooler to the front, and PSU layouts that don’t fight you during installation. Whether you’re building a living-room gaming box, a streamer’s under-desk rig, or a portable LAN party machine, at least one of these eight cases should fit your desk, your budget, and your parts list.
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Our Top Picks
Thermaltake Tower 250 Snow Mini-ITX Mini Tower; 2x120mmCase11.1 x 11.8 x 19.9 inches19 PoundsCheck on Amazon
Cooler Master NR200P V2 Mini-ITX PC Case ReadyMini-ITX14.65 x 7.28 x 11.5 Inches10.85 PoundsCheck on Amazon
Top 3 picks at a glance
Thermaltake Tower 250 Snow Mini-ITX Mini Tower; 2x120mm CT Fans Included; 360mm...Check priceQuick Picks
| Product | Best for | Price |
|---|---|---|
| Thermaltake Tower 250 Snow | Best overall flexibility | Check on Amazon |
| Cooler Master NR200P V2 | Best for modern GPUs | Check on Amazon |
| Vetroo M06 | Best budget pick | Check on Amazon |
| Stratos SFF | Best airflow out of the box | Check on Amazon |
| RUIX OV502 Pro | Best panoramic showpiece | Check on Amazon |
| JOYJOM Aluminum Mini ITX | Best aluminum build quality | Check on Amazon |
| Thermaltake TR200 WS | Best for storage-heavy builds | Check on Amazon |
| SGPC K49BL | Most portable SFF build | Check on Amazon |
How We Compared
Our first filter was simple: every case here must support a 240mm radiator, either explicitly or through mounting points that comfortably accommodate a standard 277mm-long dual-fan AIO. We then looked at GPU clearance, since a radiator often steals the space a long graphics card needs — the range across this list runs from compact triple-slot support up to 365mm of card room. PSU compatibility mattered too; SFX units free up interior volume in the smallest chassis, while ATX-friendly mid towers keep budgets down.
We also weighted real-world usability: how easy the case is to build in, whether fans are included, cable routing options, and whether the design suits desk, floor, or shelf placement. We deliberately avoided assigning invented thermal numbers — instead we highlight airflow design, fan specs, and layout logic so you can match a case to your components with confidence.
The 8 Best Picks
1. Thermaltake Tower 250 Snow — Best overall flexibility
The Tower 250 is the most accommodating chassis on this list. Its dual-chamber design separates the PSU and cabling from the main compartment, which means your 240mm radiator (it actually supports up to 360mm) never has to share air with a wall of wires. Two 120mm CT fans come included, and with 360mm of GPU clearance, even oversized flagship cards slot in without argument. The snow-white finish and panoramic glass make it a showpiece, but the layout is what wins builders over. This is the case to buy if you want one chassis that survives several upgrade cycles, from a mid-range 240mm-cooled build today to a big-GPU rebuild later.
- Supports up to 360mm radiators, far exceeding the 240mm requirement
- Dual-chamber layout simplifies cable management and airflow
Skip it if you want the smallest possible footprint — this is a mini-tower, not a shoebox.
2. Cooler Master NR200P V2 — Best for modern GPUs
The NR200P V2 is the refinement of a beloved SFF formula, and it’s built with current-generation graphics in mind. Cooler Master explicitly designs it around cards like the Nvidia RTX 5090 and AMD RX 9070 XT, with a 357mm vertical GPU mount and tempered glass to show the hardware off. A 280mm AIO is supported, so a 240mm radiator fits with room to spare, and the SFX PSU-ready layout keeps the interior open.
- 357mm vertical GPU mount handles flagship-length cards
- 280mm AIO support gives you radiator mounting flexibility
- Requires an SFX power supply, an added cost if you don’t own one
Skip it if you already own a full-size ATX PSU you want to reuse.
3. Vetroo M06 — Best budget pick
It’s technically a micro-ATX mid tower that also accepts mini-ITX boards, which means you get more interior breathing room than most true SFF cases at this price. A 240mm radiator mounts without gymnastics, and the mid-tower volume leaves generous space for cable management and future upgrades. The trade-off is polish: you won’t find premium tempered glass panoramas or bundled premium fans here. But for a first build, an office rig that games on weekends, or a kid’s or student’s PC where budget matters most, the M06 does everything essential. Buy a couple of decent 120mm fans and it’s a complete platform.
- Excellent price for genuine 240mm AIO support
- Micro-ATX compatibility adds upgrade flexibility beyond ITX
- Basic feature set — no premium glass or included high-end fans
Skip it if aesthetics on your desk are a priority; this is a function-first case.
4. Stratos SFF — Best airflow out of the box
The SFF layout takes mini-ITX boards and SFX power supplies, includes a PCIe 4.0 riser, and is explicitly 240mm AIO ready. Triple-slot GPU support up to 125mm wide accommodates thick modern cards. The high-rpm fan range means you can tune between quiet desktop use and aggressive cooling during gaming sessions.
- Four PWM ARGB fans and a controller included
- PCIe 4.0 riser and triple-slot (125mm) GPU support
- 125mm GPU width limit excludes some extra-thick flagship cards
Skip it if you’re planning a four-slot-thick monster GPU; check card width first.
5. RUIX OV502 Pro — Best panoramic showpiece
The OV502 Pro leans hard into the panoramic tempered glass trend, wrapping the front and side in glass for an uninterrupted view of your build. Despite the showcase design, it stays practical: a 240mm AIO is supported, GPUs up to 340mm fit, and RUIX highlights optimized airflow in the mini-tower layout. This is the case for someone building a desk centerpiece on a mid-range budget — an ITX or micro-ATX board with addressable RGB lighting will look genuinely high-end inside it. Just plan your cable routing carefully; glass on three sides exposes everything.
- 340mm GPU clearance covers nearly all mainstream cards
- Glass-heavy design demands disciplined cable management
Skip it if you prefer mesh-front airflow-maximalist designs.
6. JOYJOM Aluminum Mini ITX — Best aluminum build quality
The JOYJOM is the boutique option here: an aluminum small-form-factor chassis with a PCIe 3.0 riser, designed around true mini-ITX footprints. Aluminum construction gives it a rigidity and finish quality that steel cases at this price can’t match, and the compact SFF layout is aimed at builders who value density — a small gaming PC for the living room, a clean desk build, or a portable rig. The riser keeps the GPU properly oriented in tight quarters, and radiator support accommodates a 240mm AIO in compatible configurations.
- Aluminum panels offer premium build quality and low weight
- True SFF footprint with included PCIe riser
- Tighter clearances require careful component measurement
Skip it if you want room to grow — this case rewards planners, not upgraders.
7. Thermaltake TR200 WS — Best for storage-heavy builds
The TR200 WS is the sleeper pick of this list. It’s a micro chassis supporting both mATX and mini-ITX boards, with a wood front trim that gives it a warm, furniture-friendly look no glass slab can match. Better still, it supports 360mm radiators (so 240mm is easy), offers 365mm of GPU clearance, 175mm of air cooler height, and — uniquely here — a 5.25-inch bay for an optical drive or drive-themed accessories. Home lab builders, media-server enthusiasts, and anyone with a stack of drives or legacy media will appreciate that bay.
- 360mm radiator and 365mm GPU clearance leave huge headroom
- 5.25-inch bay support is rare in compact chassis
- Larger footprint than true SFF options on this list
Skip it if you want the smallest possible case; this is a compact tower, not a shoebox.
8. SGPC K49BL — Most portable SFF build
The SGPC K49BL squeezes a full gaming PC into just 8.3 liters, making it the most portable chassis here — genuinely backpack-sized for LAN parties and travel. This black PCIe 4.0 v3 edition includes a current-gen riser for modern GPUs, and it accepts a 240mm radiator in its compact layout. Around 8 liters means every component choice matters: SFX PSU, low-profile cooler as an alternative to your AIO, and a graphics card that fits the measured clearance. But if portability is the goal, nothing else on this list comes close.
- 8.3-liter volume is genuinely portable
- PCIe 4.0 riser supports modern graphics cards
- Extremely tight clearances limit component selection
Skip it if you want upgrade flexibility; volume constraints are permanent.
Buying Guide
Radiator Fit and Placement
A “240mm radiator” is typically about 277–280mm long including fans, plus 25–30mm for fan thickness and another 25–35mm for the radiator itself. Before buying, confirm where the case expects the radiator to sit — front mount, top mount, or side — and whether that position collides with your GPU length or RAM height. Cases with dual-chamber designs (like the Tower 250) isolate the radiator from these conflicts, while single-chamber SFF cases require you to plan component placement carefully. If you might move to a 280mm or 360mm AIO later, the NR200P V2 (280mm) and Tower 250/TR200 WS (360mm) give you that path.
GPU Clearance and Riser Cables
Modern graphics cards range from around 240mm for compact dual-fan models to over 350mm for flagships, and thickness now matters as much as length — triple-slot cards can exceed 60mm, with some reaching 125mm-wide bracket territory. Match your card’s published dimensions against the case’s clearance with a few millimeters of slack. In small SFF chassis like the JOYJOM and SGPC K49BL, the included riser cable’s PCIe generation matters: PCIe 4.0 risers (Stratos, K49BL) preserve full bandwidth for modern GPUs, while PCIe 3.0 risers may cost a few percent of performance on newer cards.
PSU Choice and Total Budget
A 650–750W quality SFX unit covers most 240mm-cooled ITX builds, while high-end GPU builds may want 850W or more. Mid-tower options like the Vetroo M06 and RUIX OV502 Pro accept standard ATX PSUs, keeping the total build cost lower. Also budget for fans if the case doesn’t include them: the Stratos and Tower 250 ship with fans, while the M06 and OV502 Pro generally expect you to add your own.
Our Verdict
Want zero compromise? The Thermaltake Tower 250’s dual-chamber design and 360mm headroom make it the do-everything choice. And for the truly portable, the 8.3-liter SGPC K49BL is in a class of its own.
FAQ
Will a 240mm radiator fit in every mini-ITX case?
No — this is the most common SFF building mistake. Many compact cases max out at 120mm or 140mm mounting points, or only fit a 240mm radiator by sacrificing GPU length or front airflow. Every case in this roundup supports a 240mm AIO, but clearances vary from tight (SGPC K49BL) to generous (Tower 250, TR200 WS), so match the case to your full parts list.
Is a 240mm AIO better than a good air cooler in a small case?
For CPUs in the 65W–120W class, a quality tower air cooler under 155mm tall can match a 240mm AIO. Radiators pull ahead with hotter chips and in airflow-restricted chassis, where they can exhaust heat directly out of the case. If your case supports both — like the TR200 WS with its 175mm cooler clearance — choose based on noise preference and aesthetics.
Do I need an SFX power supply for these cases?
It depends on the case. True SFF designs — the NR200P V2, Stratos, JOYJOM, and SGPC K49BL — are built around SFX units. Mid-tower-styled options like the Vetroo M06, RUIX OV502 Pro, Tower 250, and TR200 WS accommodate standard ATX power supplies.
Front mount or top mount for a 240mm radiator?
Front mounting feeds your CPU the coolest air but dumps radiator heat into the case toward the GPU; top mounting exhausts heat directly out but pre-heats coolant with case air. In compact ITX builds with strong GPUs, top mount often produces better overall component temperatures. If the case only offers one position — common in SFF — the choice is made for you, so verify mount locations before buying.
