I'm using the latest stable BIOS. There's a beta but I'm not sure if adding
in more instability to a system that doesn't work already is a good idea :S
Yes, Vista64 sees all 4GB when there are 4GB to be seen.

"JW" wrote:

Is your MOBO Bios up to date and does your Vista64 acknowledge 4GB when you
have it all installed?

Also see the following KB link:

http://support.microsoft.com/kb/929605/en-us


"SuperSenshi100" wrote in message
...
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)