exfelon :
about to buy a power supply
would 750w be enough for 2 280X's and a 125w cpu?
tdp on the 280X's is 250 btw
Hi - Yes - a good quality 750w modern design PSU will do it.
From Guru3d
"AMD R9 280X - On your average system the card requires you to have a 550 Watt power supply unit.
AMD R9 280X Crossfire - On your average system the cards require you to have a 750 Watt power supply unit as minimum.
If you are going to
overclock GPU or processor, then we do recommend you purchase something with some more stamina."
If you plan on frequent OC, maybe consider going to an 850w unit.