I have almost the same system and the same problem, my system.
AMD X2 5000 AM2
4Gb ram
M2R32-MVP motherboard
ATI Raedon X1950XTX gfx
80Gb hard drive 10.000 rpm
550w Power suply
Don't try to run a 32 bit vista insted, that is going to be the same
stalling problem, I tryed it, and way even suggest that, if I have a problem
with my BMW, the answer is not to buy a Toyota, the answer is to fix my
problem, and that is way Herry started this tropic.
I will now try to update my Bios, I never tried this before, so a beginner
description of how to do that, would be very nice.