So, some days ago I got myself a quite old PC. Its motherboard is the Asus P5VD2-MX and the processor is the Intel Duo 2. The case had this old 300W (cant really remember), but no connectors for PCI-E. So I switched out the power supply to a newer CX750M. The problem with this was that upon boot, the CPU overheats to well above 70C, immediatly, and fails boot. I do aswell have the G1 760 plugged in, and I can't get any display upon boot. I've cleared CMOS, and the PC boots up if the CPU power is not connected. Any solutions?