Video card problem

I've been pulling my hair out trying to get a Sapphire-ATI Radeon 7000 card
working under Windows XP and Win2k. I have a triple boot machine running
Win98SE, Win2kpro, and WinXPpro. It's an older Gateway with a Tabor2 MB, a
powerleap 1.4Ghz, 384Mb ram.

The card works perfectly under Win98, no problems at all. Under Win2k, and
Xp however.....that's another story. The card is horrible in 16 bit color
mode, the screen flickers and text gets all messed up. I can use the card in
32 bit color mode, but it slows the computer down a bit running in 32. I
have to install drivers manually or the automatic Catalyst installer just
crashes the computer upon re-boot.

I have removed all hardware except for MB, hard drive, memory and even put
the old P3-450 back in and did a new install...that didn't help either. I
was thinking I had a bad card, but it runs perfect in Win98.

Any help or ideas would be greatly appreciated before I rip this card out
.......