I'm having very similar graphical and crash issues with an Athlon 62 X2
5000+, a Gigabyte GA-MA69VM-S2 mobo, 4GB RAM, X1950Pro under Vista 64 bit.
crash/freeze isn't limited to games though they certainly are the main cause.
Dropping to 2 or 3 GB RAM fixes things. What's the latest Catalyst you;ve
tried? I'm about to try 7.9 and see if it fixes things.

"SuperSenshi100" wrote:

I don't know why this happens, I've exhausted Microsoft and ATi trying to
find a reason. When I use 4 GB of RAM in Vista 64-bit and install ANY
Catalyst driver for my X1950GT PCIe video card, I get random grey bars on my
screen using Aero (basic is just fine though), and when I use any kind of 3D
application it works for a few seconds and then freezes entirely. If I
remove one stick of RAM leaving 2GB the problem is eliminated. The later the
release of the Catalyst driver, the longer it works before it freezes. Here
are complete system specs:

ASUS M2A-MVP Crossfire-ready Motherboard (ATI SB600)
AMD Athlon 64 FX-62 2.8GHz dual-core CPU
4GB (2x2GB) G.SKILL DDR2 800
ATi X1950GT 512MB PCIe Graphics
500GB WD Caviar SE16 7200RPM SATA HDD
Microsoft Windows Vista Ultimate 64-bit Edition
(Currently running 32-bit due to the problem at hand)