hi acidbox,
i have same GC (Sapphire X1950XT 256MB GDDR3) and the same problem...

i only can tell, that in win xp it works smoothly.
if you find any solution, please let me know.
thx
"acidbox" <> wrote in message
news:10296B56-F869-45B5-8A2C-...
> OS: Windows Vista 32.
> CPU: INTEL Core 2 Duo (E6600)
> RAM: 4x1GB (4GB) Kingston KVR800D2N5K2
> MOBO: INTEL DG965WH
> CARD: Sapphire X1950XT 256MB GDDR3
> DRIVER: 7-1_vista32_dd_ccc_enu_41241
> ISSUE: Computer Hangs & Reboots
> MONITORS: DUAL Samsung 204BW 20" Screens
> MONITOR SETTING: Extended Desktop
> -------------------------------------
>
> No matter what Game I run, Company of Heroes, Battlefield 2, even old
> games
> like Asheron's Call, the computer will show garbled graphics for about 3
> seconds, then the screens go black and my computer reboots.
>
> I can get it to work, properly. Every time I turn on my computer, I have
> to
> re-install the ATI driver from scratch (choose to overwrite existing
> driver).
> After the install, I can play games no problem.
>
> This is frustrating and I'm sure it has a lot to do with Vista and not my
> graphics card, because IMO Vista is not stable. If you have an insight,
> please advise.