Will a Seasonic S12ll 520w handle an MSI R9 390, or should I go with the 620w version?

[gtfo21]

I'm planning to get the MSI R9 390 with an i5-4690k. I was wondering, that my Seasonic 520w PSU migth won't handle them. So is the 520w enough, or should I go with the 620w version?

 

[GhislainG]

The GPU can draw up to 27A from the 12V rail while running a stress test and the PSU provides 40A. The 620W wouldn't work as hard, but the 520W should be enough.

 

[burgessanthony]

620. 520 is pushing it too tight. 280watts from 390 max in gaming with an OC. I pull 450 ish from the PSU when really pushing hard under gaming and that's a good point for a 620W. I use that PSU in 620 form. It works fine, gets a bit loud under load (fan noise), but very stable.