6 to 8 pin for gtx 770 lightning?

[Derik22]

Hi guys so i will probably buy gtx 770 lightning but i have seasonic 620gm 620w which have one 6 pin and one 6+2 pin and for lightning i need 2x8 pin i know with lightning i will also have 6 to 8 pin adapters but how much is safe to use these adapters also my psu have two rails 2x24A and have i5 3570k @4.2ghz with 1.152v?

Thanks

 

[amenx]

It should be OK. The ref 770 power draw is 230 watts and the lightning adds around 20 watts more to that according to reviews. So power from pci-e slot = 75w, max power from 8 pin connector = 150w, power from 6 pin connector = 75w, so should be covered.

 

[amenx]

Btw, as I recall the gtx480 had 6 pin + 8 pin connectors. And its TDP was 250w, about the same as your lightning.