Ever look at a powerful computer and wish it took up less space? Imagine fitting a high-performance gaming rig on a small desk without sacrificing power. That’s the magic of Small Form Factor (SFF) PCs, but finding the right case can feel like a puzzle. You want something tiny, yet it needs to cool your hot components and look great doing it. Many builders run into trouble trying to cram big parts into small boxes, leading to frustrating builds and overheated machines.
Choosing the perfect SFF case means balancing size, cooling potential, and compatibility. It’s a challenge many tech enthusiasts face when shrinking their setups. This guide cuts through the confusion. We will explore what makes a great SFF case and show you exactly how to pick one that fits your needs perfectly.
Keep reading to discover the secrets to a successful, compact build. We are diving deep into the best features and crucial measurements so your next SFF project is smooth sailing from start to finish.
Top Sff Case Recommendations
- Minimalistic sleek design 26.3L micro form factor chassis
- Side and top panels are designed with steel mesh
- Accommodates M-ATX and ITX motherboard with 4 slots 415mm large GPU
- Supports up to 360 radiator and 10 x 120mm fans
- Supports ATX/SFX/SFX-L and LIAN LI Edge PSU that can be mounted sideways or frontways
- Micro ATX Case: The case fits for Micro ATX Mohterboard (Max 25.5x25.5cm) and ITX Motheroard (17x17cm)
- Compatibility Accessories: Supports standard ATX Power Supply (150*140*86mm), Supports Graphics Card Max length is 250mm, Lenght is 225mm if you install 120x120x25mm fan on the front side, Supports 3x 3.5'' HDD and 1x 2.5inch SSD, or 2x 3.5'' HDD and 1x 2.5'' SSD if install 2pcs 120*120*25mm fans on the front side. Supports 2pcs 120*120*25mm (front side) and 1pcs 80mm (Back Side) fans, Supports CPU Cooler height Max 135mm.
- Material: The Body of Case is made of 0.8mm SPCC, with lots of air vents for heat dissipation
- Interface on Front Panel: 1xUSB3.0, 1xUSB2.0,Audio&Mic, Power Button, Reset Button
- Packing Include: 1* Black Micro ATX Case only, not inlcude other accessories
- Compact ITX Design Unleash top-tier performance with a sleek 18.25L footprint, exclusively accommodating Mini-ITX motherboards
- Strictly SFX Fit Engineered for SFX only power supplies, perfectly matched with the Cooler Master V SFX Gold.
- Horizontal Mounting Designed for horizontal GPU setups, supporting high-end GPUs up to 330mm—including RTX 5080 |RX 9070 XT.
- Airflow Unleashed Unlock Maximum airflow setup with support for 165mm CPU coolers and up to 6 fans.
- Stay Cool Under Pressure Removable side bracket allows fast 240/280mm radiators or fan setup, unlocking maximum cooling potential.
- 【Perfect for Home or Travel】Built to be portable and compact the TR100 does a great job with providing a small footprint at home and perfect for travel.
- 【mITX Engineered】 Coming in at 18.9 liters and optimized for mITX SFF builds with its dual chamber design to provide plenty of options for components.
- 【Tiny but Mighty】While coming in at a small size, space for components is pretty roomy at 360mm GPU clearance, 280mm Raditator support, SFX and SFX-L PSU support, and 68mm of CPU cooler clearance.
- 【PCIe 4.0 Riser】 The TR100 comes with an included PCIe 4.0 Riser cable to meet the demands of modern GPUs bandwidth requirements and to faciliate easy installation.
- 【Removable PCIe Bracket】Featuring a removable PCIe bracket for straight forward GPU installation, not to mention an integrated GPU brace for added security.
- JONSBO/JONSPLUS Z20 Mini Micro-ATX PC with Detachable Carrying handle-Built with only about 20L of volume, be easily placed in various desktop environments..Easier to build your PC,More convenient
- Thick to 2mm integrated bent steel panels (panel + top panel)Complemented by a large area of delicate square openings,matx case Combines heat dissipation and craftsmanship,Comprehensive Coverage Magnetic Dust Filter
- Innovative Design: Removable PCI-E Fixing Piece to Optimize the Installation Experience for Longer GPU PC Case with handle
- [FAN]TOP 120mm*2/140mm*2 Bottom 120mm*2/140mm*2 Real 120mm*1 /92mm*1
- [GPU Clearance]：Up to 363mm，depends on other hardware configurations 【ATX PSU】 ATX/SFX/SFX-L The power supply can be adjusted in multiple gears. It is recommended to check the picture for detailed introduction to prevent interference from different hardware. It supports SFX side mounting.
- JONSBO D32 STD Micro-ATX PC Case- Unmatched Price per Performance - An economical M-ATX chassis that is compatible with main popular hardware such as back connect motherboard, 240AIO, 365mm GPU , ATX(150-200mm) /SFX-L/SFX PSU (16A plug except) etc. easier to build your PC,More convenient.
- 【Small and Compact】 - Desktop dessert grade size control, mini case Bottom with magnetic dust proof net
- 【Water Cooling】: Top 240 AIO 【CPU Air Cooler】:164mm MAX (Intel CPU) or 163mm MAX (AMD CPU)
- 【FAN:】Top 120mm*2/140mm*2 Bottom 120mm*3/140mm*2 Rear 120mm*1
- 【GPU Length】: 365mm /14.37IN
- JONSBO T9 BLACK 4.0mm Aluminum SFF Desktop PC Case- 【4mm all aluminum shell】aluminum alloy sandblasting process with delicate metallic texture. Three sided CNC grille design provides excellent heat dissipation efficiency Fingertips glide over the aluminum grille with a crisp piano sound.
- 【20mm solid wood base】integrated base with hidden wiring, solid wood and aluminum box texture collision.
- ITX motherboard has three levels of mobile and flexible hardware installation, with effective matching of graphics card thickness and heat sink height. Support for radiator height and graphics card thickness in different gear settings: Level 1: Install a 3-channel graphics card with a heat sink height of<58mm Level 2: Install 2.5 slot graphics card heatsink height<68mm Level 3: Install a 2-slot graphics card with a heat sink height of less than 78mm
- Graphics card support: Normal support for graphics cards up to 310mm in length. When installing a 3.5mm HDD, graphics cards up to 202mm in length are supported
- Tool -free ITX Case-Tool free install the case Standard with a PCI-e Cable(Upgrade to pcie 5.0 in 2026)
- Mini ITX PC Case：D32R mini pc case only fits Mini-ITX motherboard type with dimensions (170mm x 170mm) as well as for the installation of a flex power supply （150x80x40mm）.
- Excellent Heat Dissipation Mesh：This mini itx case has fashionable circular mesh,not only does it provide better ventilation, it is also a very effective design for noise insulation.
- This compact PC case,205L*89W*228Hmm,is lightweight and does not take up an inch of space for young girls, and can be hidden in the corner of a bookshelf or a corner of desk with a single move. Can be easily hidden in the luggage compartment, like a laptop to accompany you to faraway places.
- This sff case can stand or lie down is perfect for housing a HTPC. Their small size makes them a great fit for most TV shelves and closets, plus they won't look out of place next to other home theater equipment.
- Made of SPCC material, 0.8mm thickness, tough compression resistance as well as anti-rust features, it maintains the advantage of being lightweight without losing its excellent compression resistance.
The Ultimate Buying Guide for Small Form Factor (SFF) Cases
Small Form Factor (SFF) cases are fantastic for building compact, powerful computers. They save desk space and look great. Choosing the right one, however, needs careful planning. This guide helps you pick the best SFF case for your needs.
Key Features to Look For
When you shop for an SFF case, focus on these important details:
Size and Volume (Liters)
- Volume: SFF cases are measured in liters (L). Smaller volumes mean smaller PCs. Look for cases under 20L for truly tiny builds. Bigger SFF cases (20L to 30L) offer more room for powerful components.
- Footprint: Check the case’s width, depth, and height. Make sure it fits where you plan to put it.
Component Compatibility
- GPU Clearance: Modern graphics cards (GPUs) are long and thick. Always check the maximum supported GPU length and thickness (usually measured in slots). This is critical!
- CPU Cooler Height: Air coolers must fit under the side panel. Measure the maximum cooler height allowed.
- PSU Type: Many SFF cases require smaller power supplies, like SFX or SFX-L, instead of standard ATX PSUs.
Cooling Support
- Fan Mounts: See how many fans fit and where they go (top, bottom, side). Good airflow keeps your PC fast and quiet.
- Radiator Support: If you want liquid cooling (AIO), check if the case supports a 120mm or 240mm radiator.
Important Materials
The materials used affect the case’s look, weight, and durability. Good materials help manage heat better.
- Steel (SECC): This is common and strong. Steel cases offer good rigidity and often lower the overall price.
- Aluminum: Aluminum is lighter than steel. It often looks premium and helps dissipate heat slightly better, though it usually costs more.
- Tempered Glass/Acrylic: These materials form the side panels. Tempered glass looks fantastic for showing off your parts. Acrylic is lighter and less likely to shatter but can scratch easily.
Factors That Improve or Reduce Quality
Quality isn’t just about the parts inside; the case design matters greatly.
Positive Quality Factors:
- Tool-less Access: Panels that come off easily without screwdrivers improve building and maintenance.
- Cable Management: Good routing channels and tie-down points make wiring clean. A tidy interior helps airflow.
- Dust Filters: Removable, easy-to-clean dust filters keep the inside of your computer clean over time.
Negative Quality Factors:
- Poor Airflow Design: Cases with solid front panels and very few vents trap heat. Avoid these if you plan to use powerful CPUs or GPUs.
- Sharp Edges: Cheaply made steel edges can cut you during installation. Feel the edges if possible.
- Proprietary Parts: Some very small cases use custom brackets or screws. If you lose these, replacements are hard to find.
User Experience and Use Cases
Your intended use dictates the best SFF case choice.
For Maximum Power (High-End Gaming):
You need a slightly larger SFF case (18L-25L). These cases often allow for longer, three-fan GPUs and better liquid cooling. Focus heavily on maximum GPU dimensions and cooling support.
For Portability (Travel PC):
Look for cases under 15L made primarily of aluminum. These are lighter and often feature handles or simple, secure side panels. You might need to sacrifice some cooling power for reduced weight.
For Office/Home Theater PC (HTPC):
A slim, low-profile case works best here. These often prioritize quiet operation and small height so they can fit next to a TV or monitor. Cooling is usually less demanding.
10 Frequently Asked Questions (FAQ) About SFF Cases
Q: Do SFF cases run hotter than standard ATX cases?
A: Yes, they often do. Because the components are packed tightly, heat can build up faster. Good SFF cases use smart airflow paths to fight this.
Q: What is the smallest common SFF case size?
A: The smallest popular sizes are often around 7 to 10 liters. These usually require very low-profile CPU coolers.
Q: Can I use a standard ATX power supply in an SFF case?
A: Rarely. Most SFF cases require smaller SFX or SFX-L power supplies to save internal space.
Q: Is building in an SFF case difficult for beginners?
A: It can be tricky. Cable management is harder due to limited space. It takes patience, but many modern SFF cases offer guides to help.
Q: What is the difference between SFX and SFX-L power supplies?
A: SFX is the standard small size. SFX-L is slightly longer but often quieter because it fits a larger, slower fan.
Q: Should I choose an ITX or a Micro-ATX SFF case?
A: Most true SFF builds use Mini-ITX motherboards because they are the smallest standard size. Micro-ATX cases offer slightly more room but result in a larger overall footprint.
Q: How important are dust filters in a small case?
A: They are very important. Since the air moves quickly in a small space, dust can accumulate fast and block tight cooling paths.
Q: What is “sandwich layout” cooling?
A: This design places the motherboard and GPU on opposite sides of the chassis, separated by the power supply or a central divider. This allows the GPU to pull cool air from one side and exhaust hot air directly out the other.
Q: Do I need liquid cooling for an SFF build?
A: Not always. Many modern, high-quality air coolers fit well in medium-sized SFF cases. Liquid cooling is often preferred for the highest-end CPUs to manage intense heat spikes.
Q: How can I check if my GPU will fit?
A: Always find the case specifications for “Max GPU Length” and “Max GPU Thickness.” Then, check the specifications for the graphics card you plan to buy and compare the numbers directly.