I just rebuilt my system with a new mobo(M4A88TD-v evo/usb3), cpu(phenom II 840), gpu(HD6670), psu and ram as well as a new SSD to complement my old 500Gb HDD. It was all working fine and I had booted into windows and was installing graphics drivers, etc. It then suddenly shut down and now neither hard drive is detected in the bios. Any ideas?