Corsair SF850L SFX-L PSU Review – The BEST SFX-L PSU

Protection Features

OCP (Cold @ 27°C)

12V: 85.8A (121.19%), 12.097V
5V: 28.7A (143.5%), 5.032V
3.3V: 30A (150%), 3.329V
5VSB: 5A (166.67%), 4.968V

OCP (Hot @ 44°C)

12V: 84.4A (119.21%), 12.103V
5V: 28.6A (143%), 5.035V
3.3V: 30A (150%), 3.331V
5VSB: 4.9A (163.33%), 4.967V

OPP (Cold @ 29°C)

1037.74W (122.09%)

OPP (Hot @ 45°C)

1021.21W (120.14%)


✓ (117°C @ 12V Heat Sink)


12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓


Proper operation



Surge: MOV
Inrush: NTC Thermistor & Bypass relay

The OCP triggering points are correctly set at 12V, but this is not true for the minor rails where OCP is sky-high, especially at 3.3V. There is no need for such high amperage at 3.3V. On the other hand, OPP is correctly set. All other protection features are present and work well.

Pages ( 8 of 11 ): « Previous1234567 8 91011Next »

Related Posts

6 thoughts on “Corsair SF850L SFX-L PSU Review – The BEST SFX-L PSU

  1. Is the included 12VHPWR cable sufficient/safe for powering an RTX 4090 FE or should a 3×8 cable/adapter still be used? If it is sufficient and totally safe, does the manual specify which ports to use or doesn’t that matter?

Leave a Reply

Your email address will not be published. Required fields are marked *