tooncake :
Thanks for these info @ko888
Though the way I understand it (correct me if I got this wrong) is that these are stress and torture test for each gpu series? And it seems that I'm looking at R9 390X with an average consumption of 350+w under these tests ..
Does that mean I'm still good for it with my 620w Seasonic psu with these info as my basis?
Gaming power consumption was also shown, in that review, on the previous page.
The power supply should always be sized to handle the worse case power draw scenario. You don't ever want the system to be shutting down due to overload because of insufficient power supply capacity.
Also don't base your power draw calculations on an AMD Reference Design Radeon R9 390X card's power draw if you're not using a reference design card. Some of the non-reference design factory overclocked cards draw more power and the card manufacturer has used two 150-Watt 8-pin PCI Express supplementary power connectors instead of the one 75-Watt 6-pin and one 150-Watt 8-pin PCI Express supplementary power connectors used on the reference design cards.
Some of the AMD R9 39?? GPU cards have been shown to violate PCI Express supplementary power connector maximum allowed power draw specs.
Based on your given system specs you should have sufficient capacity on the most critical +12V rail.