Maybe. Doubt it.
One thing that had me in fits for a while when I was building a AMD 64 machine with a Via motherboard was that the motherboard had 3 slots in it, but you could only use 2 of them for 400mhz (200mhz in ddr mode, of course) ram. You could use al 3 for 333mhz ram, but only 2 of them would work.
Well I didn't realise that and I had ram in slots 2 and 3 and it was 400mhz, the WinXP install would run fine for a little while but would always screw up on the same place. It would act like it was working for a while, then lock up...
Switching the RAM around fixed this and it ran flawlessly. Don't know if this is your situation, but it sounds familar on the face of it.