Overclocking the Overclocked..

For instance, take the MSI Hawk version GPUs or the EVGA Supercloked version GPUs.. They've already been overclocked from the reference speeds.. If 900 MHz has been overclocked to 1100 MHz or more, can I overclock it further by using MSI Afterburner, etc programs? If so, giving more cooling to the cards as they overclocked, what will be the limit? Where to stop?
 
Solution
Yes, you can overclock beyond that. The question is how far the card will go. Since it has already been overclocked a lot from the factory, there may not be much headroom left.

The limit is the same as always, when you get too high temperatures or instability/artifacting.
Yes, you can overclock beyond that. The question is how far the card will go. Since it has already been overclocked a lot from the factory, there may not be much headroom left.

The limit is the same as always, when you get too high temperatures or instability/artifacting.
 
Solution

Lmah

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May 3, 2013
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Thing to do is open up EVGA Precision and open up Heaven Benchmark in windowed mode, monitor your boost clock with the statistics graph and find a fan profile, overclock and power target that make it so you're getting your boost clock maxed 100% of the time. You can use GPU-Z to find the maximum power% that it is drawing to help you find a appropriate power target. It is best to work on the GPU overclock separately from the memory.

After everything is done run EVGA Artifact scanner for like 15-20mins to see if any artifacts are found, if there are back off your overclock a little and test again.

Edit: and to answer your original question, yes you can overclock factory overclocked cards. I managed to get a extra 90+mhz on my GPU which is a Titan Black SC and my previous 680 SC managed to get an extra +140mhz.