Hey everyone. I'm having trouble getting my second HD7950 card to register in the PCI-e slot. I originally posted this in the AMD 79XX owners club:
Alright so I'm having a little trouble figuring out how to TriFire my graphics cards. I have a Sapphire HD7970 in the first PCI-e slot, a Sapphire 7950 in the second slot (7970PCB style, but with two 6-pin connectors), and an MSI Twin Frozr 7950 in the last slot (7970PCB with one 8-pin and one 6-pin connector). I understand that I have to play around with the clocks to get them to cooperate with each other properly, but what cards need to be changed to what clocks? As of now, CCC is telling me I'm unable to turn CrossFire on because one of my "bridges is installed incorrectly". MSI Afterburner and GPU-Z do not recognize my Sapphire 7950 in the second PCI-e slot. Is this normal? Do I need to push clocks around to get the second card to recognize, or is something else wrong? I'm currently running Catalyst 13.4, but that was before I added the MSI and Sapphire 7950 cards. Do I need to reinstall as well?
The replies from my fellow OCN'ers looked like I had received a dead 7950 card from Sapphire, so I left it at that and decided I'd RMA the card when winter break rolled around.
However I have confirmed that the card is semi-working through F@H. All three of my AMD graphics cards are set up to fold, but it seems that my Sapphire card doesn't feel like working very hard. It only gets about 500 PPD, and is telling me that the current work unit it has been assigned will take 16 days to complete, versus 12 hours on the other two cards.
Could anyone give me some insight on how to get all of my cards to register through Windows 7? Did I actually receive a DOA card from Sapphire?