I'm currently building a PC with the 750K. I know, heard it all, should have gone with an FX processor for this build because FM2 processors lack of L3 cache will hinder gaming. I got the 750K for $65 and a Asus A88XM-A board for $50. So I only have $115 tied up in the board and processor. I have the 750K overclocked to a stable 4.5GHz @ 1.42V using a Hyper 212 Evo. What's the best gpu to pair with this little guy?