Josese :
Scremin34Egl :
Josese :
You need a 750w 80+ PSU for that graphics card and CPU if you are going to overclock.
http://
Max system power draw 392W with an i5 3570K overclocked to 4.2ghz
650W is plenty
Gigabyte Radeon R9 290 uses 450W loaded and i5 4670k max TDP is 80 W, so with that PSU you possibly won't be able to add another Radeon R9 290 to crossfire.... it's only my opinión.....
The R9 290 does not consume 450W on it's own. If you meant total system power, then yes he can use up to 450W so a 650W especially the XFX is ample for a single R9 290. If he wants to add another R9 290 then a 1000W would be highly recommended especially if he wants to overclock.