I signed up here for this thread, thanks for the great work! I appear to have an unsupported OEM 660, the KGB output is good but the actual limits on the card remain the same even after flashing.

I used:
Max boost freq 1202
Max voltage 1.212
Max power target 150%

What I get:
Max boost freq 1110
Max voltage 1.115
Max power target 145%

The power target actually changed from 145% to 150% in afterburner after I flashed it, but the card will not go there.