Hi Gary, On 26-Sep-04, Gary Colville wrote: > Try running a memory tester like memtest86. If it returns errors > either the memory or mobo are incapable of running at 400MHz, if not > then its probably a bad processor. I'll run the tests when the machine is back in one piece - my son has decided to mod the case so the guts of the machine are lying on our dining room table :-) Is there any way to prove, beyond a shadow of a doubt that it is the processor ? If it come to trying to return it, I think I'm going to have problems as the company I bought it from have not been very good when it comes to resolving problem items :-( > I recently saw exacly this behaviour from a 3200+ system and it turned > out to be a faulty Asus motherboard. It worked fine at lower FSBs, but > randomly barfed up its dinner at 400MHz. Ok, so fingers crossed it's the board so I can easily bung in a lower rated CPU and that should be fine. What 400MHz boards are on your list as being reliable ? I was thinking something along the lines of an MSI KT6 Delta-FISR DDR400 KT600 but as always am open to suggestions :-) -- Cheers, *Paul* Using TSO is like kicking a dead whale down the beach. -- S. C. Johnson