11-03-2011, 07:26 AM
A couple of things to try:
1) Disable SLI if enabled.
2) Make sure you have the most updated non-beta driver.
3) Try installing your driver again and reboot.
4) Make sure that your video card is properly seated and powered.
5) Try to remove 1 of the 2 cards that is currently working and place it in the PCI-express slot that is not working (keep a total of 2 cards just to check if the PCI-express slot itself is faulty).
6) Read your motherboard manual to make sure that there are no indication about this possible problem. However since it has 6 PCI-express slots then it's probably designed to support 3-way SLI and those specific slots should all be workable together.
Can you give the exact model of the motherboard?
When you say that Windows does not "see" the third card, are you referring to the Device Manager?
1) Disable SLI if enabled.
2) Make sure you have the most updated non-beta driver.
3) Try installing your driver again and reboot.
4) Make sure that your video card is properly seated and powered.
5) Try to remove 1 of the 2 cards that is currently working and place it in the PCI-express slot that is not working (keep a total of 2 cards just to check if the PCI-express slot itself is faulty).
6) Read your motherboard manual to make sure that there are no indication about this possible problem. However since it has 6 PCI-express slots then it's probably designed to support 3-way SLI and those specific slots should all be workable together.
Can you give the exact model of the motherboard?
When you say that Windows does not "see" the third card, are you referring to the Device Manager?