Issues with 2Xdual video card in same system . . . . PLEASE HELP

digitizer123

Member
Feb 23, 2007
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Thanks first of all for your attention . . . my recently built system with 2 X dual display each (running four monitor) doing strange stuff. So far I have spoken to Tech support from Gigabyte, Nvidia, Sapphire, and others - everyone has a different openion and everyone seems to be confident that he/she is right.

Origianlly I had a nvidia 7100 card in the PCIe slot, and a Radeon 7000 in one of the PCI slot (Both dual display each). I just could not get them both to work at the same time. If I removed one the other would work, as soon as I add the second card and install the driver the first one would not work. Funny thing is both drivers look fine in device manager - no confilect and all. But when I go to display properties and try to select the monitor using the second card I would get error messege saying the driver was written for an older virsion of XP (it is not - both driver is uptodate and the last version). Then the 2 monitors would just dissappear from display properties leaving only the ones from the last card installed. If I reboot then all 4 comes back in the display properties but then as soon as I try to select and activate a monitor from the first card installed I get the same messege and then monitors dissappear.

After talking to several Tech guys from both vendor and hering "Can't use PCI and PCIe at the same time for graphics". . . .another one goes "PCI and PCIe at the same time is fine but you must use 2 cards with same chipset so they use the same driver" . . . etc. I decided to go with the second one . . . and replaced the nvidia 7100 PCIe card with a Radeon PCIe card - did not have to install driver since they both use the catalyst driver. Now they are working both at the same time - I can activate screen change res and everything fine but . . . . .

1 out of three reboot of XP - XP loads and then just before the logon screen all screens are blank and nothing happens . If I power off and restart it loads fine. Also I noticed after windows signon screen - I get that beep (Like when XP detects a new hardware) - then all screens dark for second then everything fine. One more thing, in the bios there is a setting called "Initialize first graphic . . ." PCI or PEG ???? What is PEG? Where should that be set????

Thanks . . . I am sorry for the long asss post but just wanted to give you guys all the info right at the begining.

This is not everyone's cup of tea but I know someone must have faced this same situation in the past and knows exactly what I have to do ???? Please advise . . . .
 

aatf510

Golden Member
Nov 13, 2004
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Using cards from ATI and Nvidia in the same system at the same time is definitely asking for trouble!!
Try to clean up the mess of both drivers by first uninstalling both of them from the control panel, and the do a driver cleaner run in safe mode.
If that doesn't work you are probably better off doing a fresh install and only use cards from one vendor afterwards.