Hello. I recently built a computer, with some used parts and some new. And I am having some problems, when i power it on the fans spin up and the lights turn on but NONE of the USB ports work like they don't even give power. And the GPU doesn't display anything. the other ports work just not the USB also I tried both HDMI and VGA on the GPU. the motherboard displays a code that says FF. The manual says FF means BOOT, it sonly says BOOT nothing else. I have tried clearing the cmos trick and I have removed all but one ram stick, really I have tried every thing. the friend I got the motherboard CPU and gpu from tested the hardware and he said he was able to boot. WHY cant I! The system I built has an EVGA x58 classified motherboard, Intel i7 990x extreme edition, Nvidia GTX 980 ti, corsair RM750 psu, 48 gigs of RipjawsX ddr3 ram, and a DEEPCOOL MATREXX 50 add-rgb-4f. i think it might be the psu but i want to know what other people think.
PLS get back soon