Can the fan speed of the PSU CM|V850 SFX Gold ATX 3.0 R randomly go full speed even with no loads?

After using both models of this PSU, the one from 2023 and 2024/2025, I can say that the fan speeds sometimes fluctuate. I wouldn't say they depend on the computer loads, but I do believe that the PSU has a temp sensor/regulator that can turn the fan on. I haven't personally seen mine ramp up to full load randomly, but that's not to say I haven't paid full attention to my PSU fan, considering it's usually out of view while I use my computer. I will say that I have experienced this fan at full speed, and even so, it's not very loud. I would contact Cooler Master if you believe your unit is acting quirky, although it may just be one of the protections kicking in.

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Main image of Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 2 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 3 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 4 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 5 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 6 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 7 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 8 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 9 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 10 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 11 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 12 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 13 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

Alt view image 14 of 14 - Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

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Cooler Master V850 SFX Gold ATX 3.0 Full Modular Small Form Factor Power Supply, 850W 80+ Gold, 90-Degree 12VHPWR PCIe 5.0, SFX-to-ATX Bracket, Customized Cable, 10 Year (MPY-8501-SFHAGV-3U1)

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Options: SFX / ATX 3.0 80+ Gold (850W) Black

SFX 80+ Gold (850W) White
SFX 80+ Gold (850W) Black
SFX / ATX 3.0 80+ Gold (850W) Black
SFX 80+ Gold (750W) White

ATX 3.0 & 90-Degee 12VHPWR: Featuring ATX 3.0 support and a 90-degree 12+4pin (12VHPWR) PCIe 5.0 connector, that not only enhances electrical durability but also contributes to lower temps and enhanced safety.
Enhanced Dissipation: The integrated design, of transformer, rectifier, full-bridge LLC heat dissipation, and EMI-inhibited amorphous metal materials, delivers both advanced performance and efficient heat dissipation.
SFX-to-ATX Bracket: With the included SFX-to-ATX bracket, enabling its usage across a wide range of systems, from mini-ITX to *E-ATX. In larger cases, extended cables may be necessary to reach specific components due to customized shortened cabling.
Customized Cable Length: Customized shortened modular cabling with the latest ATX 3.0 connector reduces clutter, boosts airflow, and enhances overall thermal performance. Extended cables may be necessary for larger cases to reach specific components.
/80+ Gold Efficiency

Specs

Reviews (197)

Learn more about the Cooler Master MPY-8501-SFHAGV-3U1

General
Brand	Cooler Master
Model	MPY-8501-SFHAGV-3U1

Details
Color	Black
Type	ATX3.0 & SFX 12V Ver. 3.42
Maximum Power	850 W
Fans	1 x 92mm FDB
PFC	Active
Max PSU Length	125 mm
Modular	Full Modular
Power Good Signal	100-500ms
Hold-up Time	16ms
Energy-Efficient	80 PLUS GOLD Certified: 90% @ Typical Load
Protection	OVP / OPP / SCP / OCP / UVP / OTP / Surge and Inrush Protection
Input Voltage	100 - 240 V
Input Frequency Range	50/60 Hz
Input Current	12~6A
Output	+3.3V@20A, +5V@20A, [email protected], [email protected]
Approvals	TUV, cTUVus, CE, BSMI, FCC, CCC, EAC, RCM, CB, UKCA
Connectors	ATX 24 Pin x1 = 1x (300mm) EPS 4+4 Pin x1 = 1x (450mm) EPS 8 Pin x1 = 1x (450mm) SATA x8 = 2x (100+115+115+115mm) Peripheral 4 Pin x4 = 1x (100+115+115+115mm) PCI-e 6+2 Pin x4 = 2x (400+120mm) 12VHPWR x1 = 1x (400mm)

Features
Features	The V SFX Gold provides the renowned quality synonymous with the V series, now in a compact SFX form factor. Enjoy compatibility with diverse cases, ATX 3.0 support, a robust 90-degree connector, 80 Plus Gold efficiency, premium Japanese capacitors, fully modular cabling, and a 10-year warranty. Its adaptable compatibility, small footprint, and exceptional performance make the V SFX Gold a powerhouse despite its compact size.

Dimension & Weight
Dimensions	3.93 x 4.92 x 2.5"
Weight	3.968 lbs.

Package
Package Content	V850 SFX Gold ATX 3.0 SFX-to-ATX Bracket Connectors Power Cord 4x screws Manuel

Additional Information
Date First Available	October 31, 2024

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