Hey all, I have a DFI NF4 Ultra-D @1.55v 2.4ghZ prime stable. When I followed the O/C guide and was testing the CPU only, I kept getting errors/lockups at about 2.5ghZ. Somewhere else on this forum(can't quite remember where) I read that using the SATA1 port yields worse overclocks, which is the port my HD is currently hooked into. Is there any truth to this?