can't get ati card to run properly
vga card: new sapphire radeon 4850
board: asrock k10n78m pro (with gf 8200 onboard vga and GF8100 chipset)
cpu athlon64 x2
new be quiet 580w psu
the onboard VGA is disabled in bios (by setting shared memory to "auto" and declaring PCIE as primary, just like the manual said)
fresh XP professional install with all updates (incl SP3)
no other software installed so far (no anti virus)
without installing any driver, so that im just using the native windows drivers, the card is working and capable of delivering all resolutions @32bit color depth
but no ati driver will work, neither the one provided on cd, nor the latest stuff from ATI website.
I tried several combinations, each with a complete fresh XP installation just to be on the safe side: just display drivers or the full package, with or without nvidia mainboard drivers, stock CD ati drivers or from website, win XP updated to SP1, sp2 or all the way to SP3
no joy.
when i have ati display driver installed i can only start windows in "VGA mode". when I try to start normal, the last thing I see is the win loading screen, before my monitor stops to get any signal.
when using the VGA mode, I can get to desktop. device manager shows radeon 4850, no conflict, no other vga device visible. When I try to get out of "vga mode" by changing resolution - bang, no signal. when I try to simply reboot - windows loading screen, then no signal.
removing ati drivers, going back to win native - card displays every resolution I want.
need fresh ideas...