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Do you want to know which SFX power supplies are compatible with your custom Mini-ITX Build? Check out our five recommendations.
Choosing the right PSU for your SFF build can be complicated. There are countless PSUs, but generally, those are on the ATX side of things. Let’s say you got a fancy new Mini-ITX case and bought a PSU without knowing certain things. Chances are the PSU won’t fit in. But here is the fun part: You can plug an SFX form factor PSU into a standard ATX / E-ATX cabinet, and you won’t even notice the difference, except that the SFX PSU is much smaller.
However, there are a few problems when choosing SFX power supplies if you are too ambitious with your GPU or CPU choices, especially high-end models with high power demands. Budget SFX models may struggle with high-end GPUs or CPUs due to increased heat and limited airflow, potentially leading to PSU failure and risking component stability. Investing in a high-quality SFX PSU is crucial for reliability. This is why high-quality SFX power supplies tend to be more expensive than ATX models with the same power rating, often featuring higher efficiency ratings.
Our listicle today considers all the potential issues you might face and presents the five best fully modular SFX power supplies for compact builds in 2025. Let’s dive in!
Disclaimer: The prices for SFX Power Supplies mentioned are sourced from Newegg.com dated March 26, 2025. Prices may vary depending on your region, retailer, and other external factors. Please verify product specifications with the PSU’s manufacturer to ensure perfect compatibility.
1. Corsair SF750 Platinum
Price- $179.99
Key Features
- Delivers up to 750W of continuous power with 62.5A on the +12V rail.
- 80 PLUS Platinum certification with up to 92% efficiency at 50% load.
- SFX Form Factor.
- ATX 3.1 compliant and has native PCIe 5.1 support over 12VHPWR connector
- It has a silent mode of operation with a dynamic profile cooling fan.
- Cybenetics A++ noise certification (18–24 dBA)
- Supports GPUs up to RTX 4090 / RTX 5080
- Warranty – 7 years
Verdict
The Corsair SF750 Platinum is a reliable option for people willing to custom-mod RTX 4000 / 5000 / high-end variants to fit their SFF case. At $179.99, it is one of the best choices not just in the SFX form factor but also in the ATX category.
2. Phanteks Revolt SFX 850W Platinum
Price- $221.59
Key Features
- Delivers up to 850W of continuous power with 70.8A on the +12V rail.
- 80 PLUS Platinum certification with up to 94% efficiency at 50% load.
- SFX Form Factor.
- ATX 3.0 compliant and has native PCIe 5.0 support over 12VHPWR connector
- Zero RPM mode for silent operation
- Supports GPUs up to RTX 4090 / RTX 5080
- Warranty – 10 Years
Verdict
The Phanteks Revolt SFX 850W Platinum is also an excellent choice for users who need 80+ platinum efficiency and a reliable power delivery solution. Like the Corsair, the Phanteks also accommodates use cases beyond the SFX form factor.
3. Cooler Master V850 SFX Gold
Price- $204
Key Features
- Delivers up to 850W of continuous power with 70.8A on the +12V rail
- 80 PLUS Platinum with up to 90% efficiency at 50% load.
- ATX 3.1 compliant and has native PCIe 5.1 support over 12VHPWR connector
- Zero RPM mode for silent operation
- Supports GPUs up to RTX 4090 / RTX 5080
- Warranty – 10 Years
Verdict
The Cooler Master V series is quite popular among system builders and integrators. It is one of the oldest and most reliable series that Cooler Master still produces today. The Cooler Master V850 SFX Gold also has a use case beyond the SFX form factor.
4. SilverStone Extreme 850R Platinum
Price- $220.99
Key Features
- Delivers up to 850W of continuous power with 70.8A on the +12V rail
- ATX 3.0 compliant and has native PCIe 5.0 support over 12VHPWR connector
- Cybenetic Platinum efficiency certification
- Supports GPUs up to RTX 4090 / RTX 5080
- Zero RPM mode for silent operation
- Flexible and flat cables
- Warranty – 5 Years
Verdict
The SilverStone Extreme 850R Platinum is also an excellent choice to pair with any high-end RTX 4000 / 5000 series (up to 5080) GPUs. The only catch is that the company provides a 5-year warranty, which is less than their competitors.
5. Thermaltake Toughpower SFX Platinum 850W
Price- $179.99
Key Features
- Delivers up to 850W continuous power with 70.8A on the +12V rail
- ATX 3.1 compliant and has native PCIe 5.1 support over 12VHPWR connector
- Meets 80 Plus Platinum efficiency at 115V AC input
- Supports GPUs up to RTX 4090 / RTX 5080
- Zero RPM mode for silent operation
- Low-profile cables for easier routing
- Warranty – 7 Years
Verdict
Like the others on this list, the Toughpower SFX Platinum 850W is also a great contender for the SFX form factor segment. As long as you plug in anything other than an RTX 5090, you are good to go; this applies to every PSU mentioned in this listicle.
Selecting either of these PSUs will provide reliable performance across your hardware choices as long as you stay within the power budget. We wish you luck with your purchase.
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