so i have a cx600w and i want to crossfire r9 280x, get a fx 8350, and crosshair v formula-z motherboard, will it be able to cope?
No. You need a 750-850w psu for that.
Nice quality 750W for non-overclocking
At least 800W if you're overclocking.
ah, ill have top forget crossfire then... i cant get another psu