What Power Supply do I need for my GPU?

That Seasonic might be a higher quality unit if you are looking to buy a PSU (or the lower priced S12II 520, for that matter).

If you already own the DeepCool PSU you were asking about though, it would probably work fine. Even the most power-hungry of those cards (the RX 580) uses just over 200 watts at full load, and combined with the rest of the system probably wouldn't ever need more than around 350 watts from the PSU. That PSU also apparently comes with two 6+2 pin PCIe power connectors, which should be enough connections for any single graphics card.
 

jakubek160

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May 22, 2017
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I have a 400w Psu with gtx 1070 (was using rx 580 on this as well) , to be ohnest the 400w is on the line and a sweet spot. I personally would suggest to go a little bit higher and get the 500w Psu in case you want to upgrade something in the future you can even get 600w psu. Here are the ones I recommend :

BeQuiet pure power 500w modular - https://www.amazon.co.uk/Be-Quiet-BN277-POWER-Cooling/dp/B01N4P1305/ref=sr_1_2?ie=UTF8&qid=1496001120&sr=8-2&keywords=be+quiet+500w+silver

EVGA 500w - https://www.amazon.co.uk/EVGA-Bronze-Power-Supply-Unit/dp/B01F67KZEC/ref=sr_1_1?ie=UTF8&qid=1496001158&sr=8-1&keywords=evga+500w+silver

BeQuiet 600w modular - https://www.amazon.co.uk/Be-Quiet-BN278-POWER-Cooling/dp/B01MY98CM1/ref=sr_1_2?ie=UTF8&qid=1496001198&sr=8-2&keywords=be+quiet+600w+silver

I personally have the 400w BeQuiet , but I also have at my place Antec VP 500 currently in a second rig and I have to say that it does the job , but still from my own experience these ones are the best :)