I have an Intel 2 Duo E6550, 8GB DDR2, and the CPU graphics. I want to get a GTX 750 Ti, but everyone keeps telling me it won't fit. Could someone tell me if there's a way to make it fit, and if not, another graphics card? I've heard I need to get the Galaxy GTX 750 Ti, but I cannot find one ANYWHERE. Could I get some help please?