...the GTX275 I mod'd recently showed solid gains from adding input caps on the power phases...it appears as if the OCP mod is helping with excess ripple "tolerance" that is common when you have insufficient capacitance in the circuit. Would be nice to see some results on adding 4x input caps to these 285's... if someone would be willing to test. I used 16v 1800uf caps btw..GPU was running small bump in voltage at 1.25v, 756c/1625s on stock cooler.

Thanks @ the OP ..mods are always appreciated