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Cooler Master V850 SFX Gold: an 850W small-form-factor PSU explained
An 850W fully modular SFX power supply with 80 Plus Gold efficiency, ATX 3.1 and a 90-degree 12VHPWR connector. What the specs mean for compact PC builds.
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The Cooler Master V850 SFX Gold (model MPY-8501-SFHAGV-3U1) is an 850W power supply in the compact SFX size. It is meant for mini-ITX and other small-form-factor PC builds where a full-size ATX supply won't fit, but it can also go in larger cases with the included bracket. It is rated for modern graphics cards through the ATX 3.1 standard.
What SFX means
SFX is a smaller power-supply standard than ATX, and it is common in compact cases. This unit is about 3.9 x 4.9 x 2.5 inches (roughly 10 x 12.4 x 6.4 cm) and weighs 3.1 lb. Cooler Master says the bundled bracket makes it compatible with cases from mini-ITX up to E-ATX systems, because the bracket adapts the mounting to a standard ATX position.
ATX 3.1 and the 12VHPWR connector
The listing says the unit supports ATX 3.1 and delivers up to 600W to a graphics card via a 90-degree 12VHPWR PCIe 5.1 connector. The angled plug is intended to ease cable routing in tight cases and improve durability, according to the brand. It names support for graphics cards such as the RTX 5080 and RX 9070 XT. Always check the maker's specifications for a specific card, and follow the manual when connecting power cables.
80 Plus Gold efficiency
80 Plus Gold is a certification for efficiency, and Cooler Master states about 90% efficiency. Higher efficiency means less energy is lost as heat when converting wall power to the DC power your parts use. The brand also cites a design using a transformer, rectifier and full-bridge LLC layout with amorphous metal for EMI control.
Cables and modularity
The supply is fully modular, so you connect only the cables you need. That reduces clutter and helps airflow in a small case. Cooler Master calls the cable lengths customised for compact builds and points out that larger cases might need extension cables. The description mentions 16AWG PCIe cables.
Fan and components
A 92mm fluid dynamic bearing (FDB) fan handles cooling; FDB designs are typically quiet and long-lasting because the bearing is self-lubricating. The listing says all capacitors are Japanese, which the brand says improves efficiency and reduces ripple noise. It also claims 160% higher power density than its MWE 850 V3 model and lists a 10-year warranty in the title.
Who it suits
It suits builders of compact gaming or workstation PCs with a high-draw graphics card. A standard mid-tower build has less need for SFX size.
What to check before you buy
- Case support: confirm your case takes SFX, or SFX with the ATX bracket.
- Cable length: check that the cables reach your components, particularly the GPU connector.
- GPU power plug: make sure the 12VHPWR connector matches your graphics card.
- Total power: add up your parts' requirements and leave headroom.
- Wiring safety: follow the manual and any warnings, and switch the supply off and unplug it before working inside the PC.
The short version
- 850W fully modular SFX power supply with ATX 3.1 and a 90-degree 12VHPWR connector.
- 80 Plus Gold, about 90% efficiency per the brand.
- 92mm FDB fan and Japanese capacitors.
- Includes a bracket for ATX-sized mounting.
- 10-year warranty as shown in the title.
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