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7970 Running on 1155 PCI 2.0

Cheers dave think thats my mind made up, powercolor it is put that on high i push for bit more.

That said have you encounterd and driver issues with catalyst drivers, TDR example i know driving me nuts with gtx 560 display recovery. Whats the oc software you using buddy cheers dave.
 
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No problems with Catalyst drivers tbh, just using the Catalyst overclocking software - Always better than running addon utilities imo (less processes)
 
I was interesting in jumping to the Asrock Gen 3 Extreme 7 board, which has Tri-Fire (2 x 16x and 1 x 8x) and weirdly in a few benchmarks, the P67 motherboards performed better with multi-GPU than the PCI-E 3.0/2 x 16x boards. Make of this what you will, but I think that 2 x 7970 sharing 16x PCIE 2.0 lanes, are virtually no different to sharing 32x PCIE2.0/3.0 lanes. So a single card will have no issues whatsoever.

I believe the Asrock extreme 7 with 3 cards runs @ X16 / X8 / X8.

Two cards @ X16 / X16
 
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