Do I need a new PSU with this rig

steverebo · 2025-09-21T12:13:51+0100

Hi guys I am after some advice regarding my new build and PSU requirements. Ive tried the online calculators and have had mixed results between 750w and 1000w I already own a corsair SF850L Psu. My specs are:

9800X3D Overclocked
Gigabyte Aorus Master X670E
Patriot Viper 32GB DDR5 8000
RTX5080 Gamerock OC overclocked
1 x Gen 5 NVME SSD
3 x Gen 4 NVME SSD
13 Arctic P12 PWM fans
2 x D5 Pumps
Wooting 60HE Keyboard
G502 Lightspeed mouse
Soundblaster G6 USB amp

mickyflinn · 2025-09-21T12:24:33+0100

You should be fine with an 850w PSU it's the GPU power spikes that tend to trip a PSU so if that happens you should upgrade.

If you do upgrade then get a 1200w PSU to cover future demand , the NZXT 1200w 3.1 can be had for £140.

ATIorNvidia · 2025-09-21T12:36:31+0100

A good 850w is definitely fine for a 5080.

Tetras · 2025-09-21T13:11:55+0100

I wouldn't replace it unless you have issues and even if you do have issues, you could try undervolting/power limiting.