using precision 16x to overclock my 660 ti sc & wondering whatsa safe voltage increase & how high I can go.So far best stable oc is 123 pwr  104 gpu clk 305 mem clk @stock vlt 987.Furry Evga test 1202 gpu clk 704 fps score 37970 fps 632 @ a high temp of 68c. I've seen someone claiming 1275 gpu clk @ 1162 vlt .123 pwr 60 gpu clk 0 mem clk can this be true.I'm thinking the higher the the gpu clk the better but anything above 104 crashes so I'm thinking more voltage might stabilize.