well sir, gts ovp hit usually at 1.5++V and ocp even higher than that

so nope i dont think u need it

i'm at 1.49V idle and no ovp or ocp for me. but cap mods do help somewhat. i felt the card was more stable with the added caps

i will post my scores and results soon as well as some pics

add: ovp = up volts in idle till screen hits black... ocp = black screen only under LOAD.