I have 2x Dual GPU in SLI. To be honest, I used to run windows98 at 96-bit.
You can run whatever you like if you know how to get past the winblows
32-bit lock and yer video card supports it...Have never tried it since I got
up to XP, (I think the location of the registry key is different in XP)
but, ...here:
Text taken from v3 of WinTricks, a great little program for "hackers"...
(And that's the REAL version of the word "hacker", which most people have
forgotten.
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By default Windows only allows 32-bit color on your computer, which works
good for a standard PCI/AGP video card. But of you have a more powerful
video card, you can increase your color depth to a higher value. To do this,
follow these steps:
1. Open Notepad and copy the text below into it
2. Save the file and name it 'BitsPerPixel.reg'
3. Double-click on the newly Created file and select Yes
4. Restart Your computer for the changes to take effect
REGEDIT4
HKEY_CURRENT_CONFIG\Display\Settings
"BitsPerPixel"="32"
Note: Change the '32' to the maximum number of pixels allowed by your video
card.