You’re choosing a compact power supply, so start with these six options. The Cooler Master V850 SFX Gold gives 850W, 80+ Gold, ATX 3.1 readiness, and full modular cables for tidy builds. The CORSAIR SF750 2024 adds PCIe 5.1 readiness, modular cabling, and 105°C capacitors with a convenient SFX-to-ATX bracket. Apevia SFX-AP500W offers a complete connector set in a compact 500W design. Thermaltake Toughpower SFX 850W emphasizes 850W, ATX 3.1/PCIe 5.1, and low-profile cables. The Lian Li SP1000P hits 1000W with fanless idle below 40% load and Japanese capacitors. Consider your case fit, rail design, warranty, and cooling, then decide which path fits your system and budget.
| Cooler Master V850 SFX Gold PSU (ITX) |
| Best All-rounder | Form Factor: SFX (ITX) | Modularity: Fully modular | Efficiency Level: 80 Plus Gold | VIEW LATEST PRICE | Read Our Analysis |
| CORSAIR SF750 2024 SFX PLATINUM Power Supply |
| Premium Compact | Form Factor: SFX | Modularity: Fully modular | Efficiency Level: 80 Plus Platinum | VIEW LATEST PRICE | Read Our Analysis |
| Apevia SFX-AP500W Mini ITX Solution/Micro ATX/SFX 500W Power Supply |
| Budget Mini-ITX | Form Factor: SFX/Micro ATX hybrid | Modularity: Modular cables (split options noted) | Efficiency Level: Not specified as efficiency rating in summary | VIEW LATEST PRICE | Read Our Analysis |
| Thermaltake Toughpower SFX 850W 80+ Platinum PSU |
| Top Platinum Uptime | Form Factor: SFX | Modularity: Fully modular | Efficiency Level: 80 Plus Platinum | VIEW LATEST PRICE | Read Our Analysis |
| Lian Li SP1000P 1000W SFX Power Supply |
| Quiet Powerhouse | Form Factor: SFX | Modularity: Fully modular | Efficiency Level: 80 Plus Platinum | VIEW LATEST PRICE | Read Our Analysis |
| FSP 450W Mini ITX Power Supply (SFX) |
| Budget SFX Champion | Form Factor: SFX | Modularity: Non-modular | Efficiency Level: 80 Plus Bronze | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
Cooler Master V850 SFX Gold PSU (ITX)
If you need compact power with serious headroom, the Cooler Master V850 SFX Gold PSU (ITX) stands out for its 850W capacity in a tiny format. You’ll install it in an ITX case with a 80+ Gold efficiency. Confirm ATX 3.1 and PCIe 5.1 readiness, then check cables: 90° angled outputs reduce clutter, and full modular design helps routing. Verify a 600W GPU support with ATX 3.1 cables. Expect 90% typical efficiency, and note the 100% Japanese capacitors for ripple control. Use the 92mm FDB fan for cooling, and plan extended cables if needed for your case.
- Form Factor:SFX (ITX)
- Modularity:Fully modular
- Efficiency Level:80 Plus Gold
- PCIe 5.1 readiness:PCIe 5.1 readiness
- Cooling Method:92mm Fluid Dynamic Bearing fan
- Warranty:10-year warranty
- Additional Feature:90° angled cables
- Additional Feature:100% Japanese capacitors
- Additional Feature:12VHPWR PCIe 5.1 connector
CORSAIR SF750 2024 SFX PLATINUM Power Supply
The CORSAIR SF750 2024 SFX Platinum Power Supply stands out for delivering full ATX 3.1–compliant, PCIe 5.1–ready power in a compact SFX package. You’ll install it in small cases by matching the SFX form factor, using the included SFX-to-ATX bracket for larger builds if needed. It’s fully modular, so connect only the cables you require, keeping routing tidy. The unit uses 105°C Japanese capacitors and a 92mm PWM fan for cooling, with fluid dynamic bearings for longevity. It supports PCIe Gen 5.1 and resists transients, delivering stable, platinum-rated efficiency. Follow standard safety checks and test with your system.
- Form Factor:SFX
- Modularity:Fully modular
- Efficiency Level:80 Plus Platinum
- PCIe 5.1 readiness:PCIe 5.1 ready
- Cooling Method:92mm PWM fan, fluid dynamic bearing
- Warranty:Not specified
- Additional Feature:105°C Japanese capacitors
- Additional Feature:SFX-to-ATX bracket included
- Additional Feature:Type-5 modular PCIe cables
Apevia SFX-AP500W Mini ITX Solution/Micro ATX/SFX 500W Power Supply
When selecting a compact power supply for Mini ITX builds, the Apevia SFX-AP500W stands out for its flexible modular design and compatibility with both Mini ITX and Micro ATX cases. You will verify the form factor, then confirm it’s SFX/eps-like and 500W. Check connectors: 20+4pin main, 8pin 12V, 6/8pin PCIe, plus three SATA, two 4pin Molex, and a 4pin floppy. Ensure 125x100x63.5mm fits your case. Use the 8pin CPU connector if needed, split to 4+4. Use 24pin as 20+4 if required. Power on only after all cables are properly connected.
- Form Factor:SFX/Micro ATX hybrid
- Modularity:Modular cables (split options noted)
- Efficiency Level:Not specified as efficiency rating in summary
- PCIe 5.1 readiness:PCIe (not explicitly stated as 5.1 in summary)
- Cooling Method:Not specified
- Warranty:Not specified
- Additional Feature:Modular cable splits (8pin CPU 4+4)
- Additional Feature:20+4 to 20+4 adaptation
- Additional Feature:Freeform power-on requires full cable connection
Thermaltake Toughpower SFX 850W 80+ Platinum PSU
This 850W Thermaltake Toughpower SFX Platinum PSU stands out for next-gen compatibility, including ATX 3.1 and PCIe 5.1 readiness, making it a solid choice if you’re building or upgrading a compact system that needs future-proof power. You’ll see it’s fully modular, with 90mm FDB cooling and an 850W output. Check compatibility with ATX 3.1 and Intel SFX 12V 4.1. Verify PCIe Gen 5.1 readiness and the 12V-2×6 modular interface. Use the low-profile cables for tight builds, and ensure the 450W 12V connector fits your GPU. Confirm warranty and ventilation fit in your case.
- Form Factor:SFX
- Modularity:Fully modular
- Efficiency Level:80 Plus Platinum
- PCIe 5.1 readiness:PCIe Gen 5.1 ready
- Cooling Method:90mm FDB fan
- Warranty:7-year warranty
- Additional Feature:92mm PWM fan
- Additional Feature:Extremely tight voltage regulation
- Additional Feature:7-year warranty
Lian Li SP1000P 1000W SFX Power Supply
Consider the Lian Li SP1000P 1000W SFX Power Supply when you need serious power in a compact build. You’re getting an 1000W SFX unit with 125mm by 63.5mm by 100mm dimensions, plus an SFX-to-ATX bracket for flexible installation. It delivers up to 92% efficiency, certified 80 Plus Platinum, reducing heat and noise. Use its smart cooling: run fanless at ≤40% load, and engage the fan only when needed. It features 100% Japanese 105°C capacitors and fully modular cables for clean routing. The unit includes a 10-year warranty, ideal for gamers and creators seeking reliability.
- Form Factor:SFX
- Modularity:Fully modular
- Efficiency Level:80 Plus Platinum
- PCIe 5.1 readiness:PCIe compatibility implied via platform target (not explicit in summary)
- Cooling Method:Not specified
- Warranty:10-year warranty
- Additional Feature:Fanless at ≤40% load
- Additional Feature:1000W high-capacity output
- Additional Feature:SFX-to-ATX bracket included
FSP 450W Mini ITX Power Supply (SFX)
The FSP 450W Mini ITX Power Supply (SFX) is a solid option if you’re building a compact PC and need dependable power without extra bulk. You choose this model for a micro ATX setup with mini ITX focus, since it uses an SFX 12V design for compact PCs. It provides 450W output and carries 80 Plus Bronze efficiency. It’s non-modular and uses 80mm intelligent fan speed control. Cables come as black ribbon style, and a PS2 bracket is included to fit into an ATX case. Note: not intended for gaming use. Update: listing refreshed Feb 2025.
- Form Factor:SFX
- Modularity:Non-modular
- Efficiency Level:80 Plus Bronze
- PCIe 5.1 readiness:Not specified
- Cooling Method:80mm intelligent fan (noted)
- Warranty:Not specified
- Additional Feature:Non-modular design
- Additional Feature:80 Plus Bronze certified
- Additional Feature:PS2 bracket included
Factors to Consider When Choosing SFX Power Supplies
When choosing an SFX power supply, start by evaluating Power Density to ensure it fits your case and leaves room for airflow. Consider Modular Cable Ease to simplify builds and cable management, then check ATX 3.1 Readiness to future-proof for new components. Finally, assess Cooling And Noise and Platform Compatibility, comparing fan noise and supported form factors, then verify cables and connectors match your system.
Power Density Benefits
Power density shows how much wattage you get for a given space, and it’s a primary driver when choosing an SFX power supply. You measure watts per unit volume and compare models by size and output. Look for 850W SFX units in compact footprints around 125mm x 63.5mm x 100–103mm, delivering high density. Compare with standard ATX 850W models to see which one fits your case while maintaining wattage. Note design features like compact transformers and tight component layouts reduce overall volume without losing performance. Be aware that higher density needs advanced cooling, such as 92mm fans or fluid dynamic bearings, to manage heat. Verify 80 Plus Platinum or Gold efficiency to ensure effective conversion in a small space.
Modular Cable Ease
Modular cables matter for SFX PSUs because they directly affect airflow and ease of installation. Start by evaluating if the model is fully modular, which minimizes clutter and improves airflow by including only necessary connections. Consider 90° angled cables to simplify routing in tight ITX cases and to reduce cable bulk behind the motherboard tray. Look for Type-5 Micro-Fit modular connectors and 24-to-20 pin split options, which enable flexible compatibility with various motherboard and GPU configurations. If unsure, compare non-modular or fewer-cable designs, which tend to complicate cable management and obstruct airflow. Also check for an included SFX-to-ATX bracket, which enhances installation flexibility when pairing with larger cases or standard ATX mounts. Choose accordingly for cleaner builds and better cooling.
ATX 3.1 Readiness
ATX 3.1 readiness is essential when selecting an SFX power supply because it guarantees the unit can handle high-widelity GPUs and future PCIe 5.1/12V requirements. Begin by checking if the PSU is labeled ATX 3.1 and note any updated connectors and cabling. Confirm it can deliver up to 600W with appropriate cables, then verify the 12V rail stability to tolerate transient spikes from next-gen graphics cards. Look for enhanced hold-up time and tighter voltage regulation, which protect components during power fluctuations. Assess PCIe 5.1 readiness as a factor in compatibility with future GPUs. Consider compact units that advertise ATX 3.1 support for small form-factor builds needing high-wattage performance. Choose a model with verified performance data and reputable testing.
Cooling And Noise
If you’re prioritizing cooling and quiet operation, start by checking the fan design and bearing type first. Look for 92mm fans with PWM control to adjust speed based on load, balancing cooling and noise. Consider Fluid Dynamic Bearing (FDB) fans, which reduce friction and noise versus sleeve bearings, for quieter operation. Higher efficiency ratings, such as 80 Plus Platinum or Gold, cut heat generation, helping maintain cooler temperatures at given loads. Verify low ripple and tight voltage regulation, often <30 mV ripple and <±2% regulation, since less inefficiency means less heat. Some SFX units offer fanless mode below a threshold (e.g., ≤40%), enabling silent idle performance. Choose a model that matches your typical load profile for optimal cooling and minimal noise.
Platform Compatibility
To guarantees your SFX unit fits your system, verify platform compatibility before buying. Start by confirming ATX 3.1 compatibility, which supports high-power GPUs and up to 600W on the PCIe 5.1/12V rails. Check PCIe Gen 5.1 readiness to ensure compatibility with the latest graphics cards and power spikes. Consider SFX form factor requirements; ensure your case supports SFX natively or uses an SFX-to-ATX adapter for broader compatibility. Look for units offering native PCIe 12V-2×6 (12+4 pin) modular interfaces to streamline GPU power delivery. In larger builds, verify whether an included SFX-to-ATX bracket fits standard ATX cases and allows proper mounting. Assess total system power needs, then match to the PSU’s rails and modular options.
Warranty And Support
When choosing an SFX power supply, start by checking the warranty length and what it covers. Warranties typically run 5 to 10 years, signaling reliable components and long-term support. A longer warranty usually means stronger confidence in build quality and manufacturer support for compact units. Look for extended coverage on critical parts like capacitors and transformers, as this affects replacement expectations. Verify the terms, including whether you must register the product or follow specific installation guidelines to keep coverage valid. Consider available support options, such as warranty claims, defective unit replacement, and access to technical help for compatibility and installation questions. Choose a model with clear instructions, reasonable claim procedures, and responsive customer service to minimize downtime.
Final Thoughts
If you’re choosing an SFX PSU, start by matching wattage to load and case size. Compare efficiency and rails, then verify ATX 3.1/PCIe 5.1 readiness if you’ll upgrade GPUs. Check the connector set and cables for your build, and note warranties. For compact builds, consider a premium option like 850W–1000W with modular cables and solid cooling. Pick a model from Cooler Master, Corsair, Apevia, Thermaltake, Lian Li, or FSP that fits your needs and budget.
Meet Ry, “TechGuru,” a 36-year-old technology enthusiast with a deep passion for tech innovations. With extensive experience, he specializes in gaming hardware and software, and has expertise in gadgets, custom PCs, and audio.
Besides writing about tech and reviewing new products, he enjoys traveling, hiking, and photography. Committed to keeping up with the latest industry trends, he aims to guide readers in making informed tech decisions.