Graphics card PSU requirement

[TalllPaul]

I was checking the requirement a for the R9 390 and it said it needs a PSU of 750W or more with 2 8 pin connectors at 150W.

Is that 750W for the graphics card only? So I would have to add to it the consumption of my other components.

Also, u was looking at a PSU that had the two connectors but it didn't say it was 150W each :/

 

[JR23]

A reference 290/290X/390/390X will pull around 300W at most, a high quality 600W PSU is adequate for a typical system and single card with some overclocking headroom too.

The 750W guide figure includes a system in the worst case scenario, obviously they don't know what you have and want to be conservative so it's a significant over-estimate.

Nearly all popular PSU's are single rail now so 8-pins should always have 150W available to them if it meets the overall requirements.


I run a water cooled overclocked reference 290X on a 600W SFX Silverstone and it's excellent. You should be fine with any decent 650W, 850W for two cards, 1000W+ for heavy overclocking with some mad custom PCB cards.

JR

 

[TalllPaul]

Thanks a lot JR