Is it possible to Overclock my GPU?

Ben1881

Honorable
Feb 3, 2014
3
0
10,510
I have a good enough PC to run Skyrim but I have added LOTS of mods (Graphical Mods) With these and Ultra graphics my Nvidia GTS 250 stays around 65 degrees. I was wondering if it would be safe to overclock it? Just enough so that I can boost the Render distance in Skyrim.

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^^^The Mods I have installed.