I just upgraded my shuttle XPC75G2 with a PC Power and Colling 300w U1 ps and two 120mm side fans. I have 2.6c, 36GB, 1024 Kingston DDR400 (duel channel), FIC ATI 9700PRO in it. Right now I have it at 3.185G(245X13) I have the voltage set at1.5625V. BIOS reads it as 1.55V with CPU temp @40C and system temp@33C.MBM5 reads it as CPU voltage core 0 1.49v, core1 1.49v, CPU temp 44C, Case temp 33C. my question is what is a good max temp on the CPU. I don't thing voltage is a problem becouse the BIOS only goes to 1.5875V. I want to hit 250 FSB or higher if possable (so close) but getting unstable. What should I believe for CPU voltage? Bios or MBM5?