Can't overclock, what's the problem?

Th0m3v

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Dec 8, 2012
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I have a question about my Gainward GeForce GTX 660 Ti. It can't be overclocked very well on my current build, I'm overclocking it with MSI Afterburner and I can't set the Core Speed & Memory Clock any higher than about 125+ (about 3-6% of the entire meter (can't really measure that well)). If I exceed this limit, the video-driver will crash when running MSI Kombustor or any other game for that matter. I'm just wondering what causes this, or is it just the card that doesn't really support that high OCing, or does it have something to do with my motherboard?

Thanks in advance!

MOBO: MSI B75MA-P45, Socket-1155
CPU: Intel i7 2700k
GPU: Gainward GeForce GTX 660 Ti Physx
RAM: Corsair Vengeance DDR3 1600MHz 8GB CL9
PSU: Corsair CX 500W PSU BULK 80+
 

Th0m3v

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Dec 8, 2012
58
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10,630

Alright, I will google how to increase my voltage. But can you give me the basic rules of increasing the voltage? :p