I have tried upgrading my Asus A7V-E Motherboard processor from Duron 750 MHz to AMD Athlon 1Ghz. Unfortunately although it recognises the processor and hard ware my machine stops responding (no error message) just before it boots into Windows. What am I supposed to do? I’m now back with the Duron 750 MHz. Incidently, will it make a noticable difference anyway?