I have 3 7970s and 1 7950 running. (and 5870, 6950, 3 Nvidias )
All cards are slightly overclocked and the first thing I do is resetting them to standard clocks with MSI Afterburner.
The older ones tend to get hot rams after years of using so I decrease the Ram speed.
They are 24/7 working and thats the best way to keep them alive.
Last edited by conf; 12-26-13 at 03:15 PM.