How much should I overclock my gpu?

Dollas4Eva_SR

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Jun 3, 2015
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I have the GeForce GTX 960 4gb ACX 2.0 FTW edition card and installed precision x on my desktop. How much should I overclock it to the extent where nothing will be damaged severely and is it even possible to overclock it if I have the Corsair RM 650 PSU?

Thanks!