Quote Originally Posted by trayton View Post
The setting is available in AfterBurner/Precision there and the scale reflects the unlocked max target (150). But even if you're set it above 115 (eg. 140 or 150) you still see maximum of 115 when benchmarking and throttling of Vcore and frequency occurs if the card tries to go beyond that. I also tried modifying the default target/board power but same effect. Power doesn't go higher than that magical limit (132.5). I think this rules out the option that the issue is with afterburner or precision.
Btw, the Afterburner can't set the voltage properly for this card. Precision is the way to go. But since throttling is the main issue here, it is better start with a normal (1.15) or even lower voltage and see how far you can increase the clock before thottling occurs.
Regarding the voltage tables, I found for GTX660 the first table sets the maximum voltage the GPU can throttle to or what you can set manually in Precision and the second table sets the base voltage for 3D. Base voltage is not a strict setting, the card might use a lower voltage in 3D.
On my GTX660ti it never reaches the maximum power limit either. It will throttle down too, However this is due to temps getting high. Are you sure it's not your temps causing you to throttle, this is very common.

Try to keep your temps in the low 60's or less, and see if that stops your throttling.