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Hi, basically the problem is i can't do any sort of overclock or the cards will just crash not even +20mhz for example. Any idea what the problem could be?
Do what Kaapstad said though and remove 1 card and find it's max overclock (run Heaven a few passes on benching) and then repeat on the other card. In SLI, I can't run to the same overclock as a single card but it is very close.Bit of a shame really its the 670 ftw that doesnt like the overclock but my standard 670 goes up fine.

Sadly, that is the chip lottery bud![]()

Chiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiip.
Give it a bit more voltage.
Oh wait .........