I want to OC my 8800GTS 320mb vid card. I will be using Ntune. Is 600/900 a safe overclock? it looks like it currently runs at 513 for the core and 792 for the memory. It seems like it already runs hot since Ntune reports it at 63c with the fan speed of 59%. Will this be stable? Oh and what program do i need to change the bios and make this change stick