Best GPU that won't be bottlenecked by the Core 2 Duo 6300?

thesuperguy

Honorable
Apr 19, 2013
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I have a friend who's birthday is coming up and I thought of buying him an actual graphics card to replace the god awful integrated GPU he currently has. He has a somewhat decent (I guess) CPU being the Core 2 Duo 6300. I would just like to know what kind of performance I can expect before the CPU starts to make my money worthless.