10 Best Small Form Factor PC Cases With SFX Power Supply Support in 2026

Choosing a small form factor PC case with SFX power supply support is all about balancing size, thermals, and compatibility without making the build harder than it needs to be.

Whether you want a portable gaming rig, a clean desk setup, or a compact workstation, the right case should fit your GPU, cooling plan, and cable-management needs.

Best 10 Small Form Factor PC Case with Sfx Power Supply Support Picks for 2026

All-in-One SFF Builder – Cooler Master NR200P MAX V2 Mini-ITX Bundle

If you want a small form factor pc case with sfx power supply support that feels more like a ready-to-build platform than a bare chassis, the NR200P MAX V2 is built for that job. It packs a Mini-ITX layout, included 850W SFX Gold PSU, included 280mm AIO, and a PCIe 4.0 riser into an 18.25L footprint, so you can focus on the core components instead of sourcing every part separately.

Best For: Builders who want an all-in-one Mini-ITX case bundle with strong power, liquid cooling, and vertical GPU support.

Pros:

• Includes an 850W SFX Gold PSU with ATX 3.1 support and custom short cables.
• Bundled 280mm top-mounted AIO helps simplify thermal planning.
• Supports large vertical GPUs up to 357.6mm and includes a PCIe 4.0 riser.
• Compact 18.25L Mini-ITX design keeps the footprint relatively small.

Cons:

• Only works with Mini-ITX motherboards.
• Vertical GPU layout may not suit every build preference.
• Bundled components make it less flexible than a bare case.

The NR200P MAX V2 stands out if you want a streamlined SFF build with fewer compatibility decisions to make. Its included PSU and cooling make it especially practical for high-end compact systems.

Ultra-Compact TV-Style Pick – SilverStone ML09B 7L Mini-ITX Case

The SilverStone ML09B is a practical small form factor pc case with sfx power supply support for builds where every liter matters. At just 7 liters, it keeps things extremely compact while still fitting a Mini-ITX motherboard, an SFX PSU, and low-profile expansion options, making it a good fit for tight entertainment centers or slim desktop setups.

Best For: Ultra-compact Mini-ITX builds that need SFX support and low-profile hardware.

Pros:

• Very small 7-liter chassis saves a lot of space.
• Supports Mini-ITX motherboards and SFX power supplies.
• Includes one 120mm fan and supports up to two 80mm fans.
• Can handle dual-slot low-profile graphics or expansion cards.

Cons:

• Designed around low-profile components, not full-size GPUs.
• Cooling is limited compared with larger SFF cases.
• Only two expansion slots are available.

This case makes sense when compactness matters more than upgrade flexibility. If your parts are already chosen for a slim build, the ML09B gives you a very small SFX-capable enclosure without wasted space.

Premium Vertical Tower – Cooler Master NCORE 100 Air Mini-ITX Case

If you’re shopping for a small form factor pc case with sfx power supply support and want a more premium tower-style design, the NCORE 100 Air is aimed at that niche. Its 14.7L footprint, Mini-ITX-only layout, and support for SFX power supplies up to 130mm make it a compact choice for builders who also want room for a large vertically mounted GPU.

Best For: Premium Mini-ITX builds with a vertical GPU and compact SFX PSU layout.

Pros:

• Supports only SFX power supplies up to 130mm long.
• Vertical GPU mounting fits cards up to 356mm.
• Extendable frame increases width for added component clearance.
• Anodized aluminum panels give it a more premium look.

Cons:

• Requires Mini-ITX motherboards only.
• Air cooler support is limited to 50mm or 70mm height.
• Vertical GPU-only layout may not suit every build plan.

The NCORE 100 Air is a strong fit for builders who want a compact showcase case rather than a hidden box. Its aluminum construction and vertical layout make it especially appealing if aesthetics matter as much as size.

Ultra-Mini Budget Build – JOYJOM 4.3L Aluminum Mini ITX Case

The JOYJOM Mini PC Case is an extreme-space option for anyone looking for a small form factor pc case with sfx power supply support in a very stripped-down layout. With a 4.3L capacity, it supports a Mini-ITX motherboard, a FLEX-Small 1U power supply, a compact GPU, and a very low-profile cooler, so it’s best viewed as a highly size-conscious enclosure.

Best For: Ultra-small Mini-ITX builds using FLEX power supplies and compact components.

Pros:

• Very small 4.3L footprint for maximum space savings.
• Supports Mini-ITX motherboards and FLEX-Small 1U power supplies.
• Includes a PCIe 3.0 riser cable.
• Aluminum alloy body offers a lightweight, compact shell.

Cons:

• Does not support standard SFX PSUs; it uses FLEX-Small 1U units.
• GPU and cooler clearance are very limited.
• Only one expansion slot is available.

This is the most specialized option here, and it rewards careful part selection. If your priority is absolute minimal size and you already have FLEX-compatible hardware, it delivers that niche very effectively.

Compact SFX-Only ITX Upgrade – Cooler Master NR200P V2 Mini-ITX PC Case Ready

If you want a small form factor pc case with sfx power supply support that still leaves room for serious hardware, the Cooler Master NR200P V2 is built around that brief. Its 18.25L Mini-ITX layout, strict SFX-only PSU fit, and bundled PCIe 4.0 riser cable make it straightforward to build a compact system without improvising around compatibility.

Best For: Mini-ITX builders who want a compact SFX-only case with vertical GPU support and AIO cooling headroom.

Pros:

• Strictly supports SFX power supplies, including the Cooler Master V SFX Gold.
• Includes a PCIe 4.0 riser cable and supports vertical GPU mounting up to 357mm.
• Supports top-mounted 240mm/280mm radiators for stronger thermal options.
• Tool-free access and a removable GPU back panel simplify installation.

Cons:

• Mini-ITX only, so it is not for larger motherboards.
• Designed around SFX-only power supplies rather than ATX units.
• Airflow and cooling choices are more constrained than in larger cases.

Overall, this is a polished choice for builders who value a compact footprint, modern connectivity, and flexible GPU presentation. If your priority is fitting high-end parts into a small, SFX-based build, it covers the core needs cleanly.

Ultra-Portable Aluminum Build – S300 Gaming Case

The S300 is a strong pick if you need a small form factor pc case with sfx power supply support in a truly portable chassis. Its 8.1L aluminum shell, top handle, and three-sided mesh design keep the build lightweight and practical, while the included PCIe 3.0 x16 riser cable and front USB-C I/O aim to make everyday use easier.

Best For: Portable Mini-ITX builds that prioritize a tiny footprint, aluminum construction, and SFX/SFX-L compatibility.

Pros:

• Very compact 8.1L Mini-ITX case with a built-in carry handle.
• Supports 100-130mm SFX/SFX-L power supplies.
• Three-sided mesh panels help airflow in a dense layout.
• Includes a PCIe 3.0 x16 riser cable and front USB 3.0 Type-C port.

Cons:

• Requires setting motherboard PCIe speed to Gen3 for compatibility with the included riser.
• CPU cooler height is limited to 60mm.
• Graphics card support is capped at 305mm and 2.5 slots.

In practice, the S300 is best when portability matters as much as size. It gives you the essentials for a compact ITX system, but the tight cooler and GPU limits mean it suits careful part selection more than maximal hardware expansion.

Premium Sandwich-Layout Compact Pick – Lian Li A4-H2OX5 Mini-ITX PC Case

The Lian Li A4-H2OX5 is a refined small form factor pc case with sfx power supply support for builders who want premium materials and a tightly engineered layout. At 11 liters, it uses a sandwich design with a PCIe 5.0 riser cable, supports triple-slot GPUs, and makes room for a 240mm AIO while keeping the exterior minimal and well-ventilated.

Best For: Builders who want a premium 11L ITX case with PCIe 5.0 riser support and 240mm AIO compatibility.

Pros:

• 11-liter footprint keeps the build compact without giving up triple-slot GPU support.
• Includes a PCIe Gen. 5 riser cable for the sandwich layout.
• Supports 240mm AIO cooling and uses mesh panels for airflow.
• Removable bracket supports both SFX and SFX-L power supplies.

Cons:

• Mini-ITX only, so motherboard choice is limited.
• Internal storage support is minimal, with only one 2.5-inch bay listed.
• Sandwich-style builds can be less straightforward than traditional layouts.

This case stands out for combining a premium aluminum exterior with current-gen expansion support in a very small space. If you want a compact SFX-based build that still feels modern and cooling-friendly, it is a compelling option.

Portable SFF Option – Mini-ITX Case with SFX/SFX-L Support

If you want a small form factor pc case with sfx power supply support that stays genuinely portable, this Mini-ITX chassis is built around compact builds and easy transport. It supports SFX and SFX-L PSUs, fits CPU coolers up to 60mm, and allows graphics cards up to 300mm with a riser cable, making it a practical option for space-saving gaming or LAN setups.

Best For: Portable Mini-ITX builds, LAN party rigs, and compact systems that need SFX/SFX-L PSU support.

Pros:

• Detachable top handle makes the case easier to carry
• Supports SFX/SFX-L power supplies with dual mounting holes
• Two 120mm top fan mounts plus included dust filters
• Front I/O includes USB 3.0, USB 2.0, and audio jacks

Cons:

• GPU support requires a riser cable for discrete graphics cards
• CPU cooler clearance is limited to 60mm
• Best suited to Mini-ITX motherboards only

This is a good fit if portability and a compact footprint matter more than maximum internal volume. The storage flexibility and dual-fan cooling support help it cover the basics well, but the low-profile cooler limit means it works best with carefully selected parts.

Performance SFF Pick – Stratos Mini with SFX PSU and Riser

For builders looking for a small form factor pc case with sfx power supply support and stronger out-of-the-box cooling, the Stratos Mini stands out. It includes a pre-installed PCIe 4.0 riser, supports Mini-ITX boards and SFX PSUs, and is designed for GPUs up to 347 x 125mm with triple-slot room, plus 240mm AIO compatibility for more demanding hardware.

Best For: High-performance Mini-ITX gaming builds that want included cooling, riser support, and a display-focused design.

Pros:

• Pre-installed PCIe 4.0 riser cable simplifies GPU installation
• Supports 240mm AIO cooling for stronger thermal headroom
• Includes four pre-installed PWM ARGB fans with controller
• Tempered glass front and side panels showcase the build

Cons:

• Larger than ultra-compact SFF cases at 435 x 170 x 325mm
• Glassy design may matter more than minimalism for some users
• Focused on Mini-ITX builds only

This case is a strong choice if you want a compact gaming system without sacrificing included airflow hardware. The ready-to-build layout and triple-slot GPU support make it especially appealing for users who want convenience and performance in one package.

Most Compact Carry Build – Mini-ITX Case with SFX/SFX-L PSU Support

This small form factor pc case with sfx power supply support is aimed at builders who want a tighter footprint and higher portability. It supports Mini-ITX motherboards, SFX/SFX-L PSUs, up to 70mm CPU coolers, and GPUs up to 206 x 150 x 46 mm with a riser cable, while the mesh front and dust filters help keep airflow under control.

Best For: Very compact Mini-ITX builds for desks, offices, or portable systems with modest GPU needs.

Pros:

• Compact 212 x 137 x 260mm footprint with detachable carry handle
• Supports SFX and SFX-L power supplies
• Up to 70mm CPU cooler clearance is more generous than many SFF cases
• Mesh front panel and top/bottom dust filters aid airflow and cleanliness

Cons:

• GPU installation requires a double-reverse PCIe riser cable
• Graphics card clearance is limited to 206 x 150 x 46 mm
• Mini-ITX motherboard support only

Compared with larger SFF options, this case prioritizes a smaller size and easy handling over expansion room. It makes sense for users who want a neat, space-saving build and can work within the tighter GPU and riser requirements.

How We Picked the Best Small Form Factor PC Case with Sfx Power Supply Support

We focused on enclosure design, SFX or SFX-L PSU compatibility, GPU clearance, cooling support, build quality, and how easy each case should be to assemble and maintain. We also favored models that offer practical features such as front I/O, dust management, risers, and sensible internal layouts.

For a Small Form Factor PC Case with Sfx Power Supply Support, the details matter: a few millimeters of clearance can affect cable routing, radiator fit, or whether a modern graphics card installs cleanly.

Quick Comparison

Some cases in this roundup are ideal for maximum performance in the smallest footprint, while others trade a bit of size for easier building and better cooling. If you want an all-in-one solution, bundle-style options can simplify the process. If you prefer customization, look for open layouts, riser support, and flexible fan or radiator mounting.

Key Buying Factors for a Small Form Factor PC Case with Sfx Power Supply Support

PSU Compatibility

Check whether the case supports standard SFX, SFX-L, or both. SFX-L units can be quieter and sometimes easier to source, but they may reduce space for cable routing or front-mounted cooling hardware.

GPU Length and Thickness

Graphics card clearance is one of the most important specs. Measure card length, slot thickness, and whether the card mounts vertically or horizontally. A triple-slot GPU can work well in some SFF layouts, but only if the chassis was designed for it.

Cooling Support

Decide early whether you plan to use air cooling or an AIO. Some compact cases are optimized for low-profile air coolers, while others are built around 240mm or 280mm radiators. Airflow path matters just as much as raw fan count.

Build Convenience

Look for removable panels, good access to mounting points, and cable-management features. In a tight enclosure, a thoughtful internal layout can save a lot of time and frustration.

Portability and Footprint

If you plan to travel with the system or move it between rooms often, weight, handles, and chassis shape become important. Portable cases usually sacrifice some drive space or cooling headroom for convenience.

Who Should Buy Which Small Form Factor PC Case with Sfx Power Supply Support?

Choose a bundle-style option if you want the simplest path to a compact build with included PSU and cooling. Choose a flexible tower or sandwich-layout case if you want stronger GPU support and more tuning options. Choose the most compact models if desk space and portability matter more than expansion and easy assembly.

In general, the best Small Form Factor PC Case with Sfx Power Supply Support is the one that matches your exact GPU size, cooling method, and upgrade plans—not just the smallest one on the list.