Quote Originally Posted by zerazax View Post
There's a lot more to how a card performs than just clock speed... once you factor in caches, pipeline efficiency, dispatch efficiency, etc. core clocks are just one part of the equation.
Still it can't be possible to gain over 100% efficiency, unless the clockspeed somehow makes the chip more efficient as in cache/memory management etc. Thus it is impossible to get more than 100% increase in performance from 100% overclock etc.

Quote Originally Posted by cadaveca View Post
Depends on how the card is truly limted, actually. You assume that clockspeed is the inefficiency, not something else...
Still over 100% efficiency in gain is impossible.

Also another "funny" thing is that people now talk about GDDR5 overclocks. "If you OC from 900 to 1000, you don't overclock 100 MHz, but 400 MHz Instead! From 3600 MHz to 4000 MHz!", which is obviously false. Doesn't matter if you OC 4 MHz or 4 GHz, if the increase is only 4 %, besides the chips still run at 900/1000MHz, not 3600/4000.