I installed a GTX 770 and for some reason it's FPS does not live up to the fps in reviews, Battlefield drops below 40 oftenly, Team Fortress 2 drops below 30 oftenly and Skyrim drops below 30 as well, I've made sure I uninstalled my previous drivers and installed the GTX 770, Hired a professional to install it so no errors there, I did have to get a new PSU since my old one kept cutting out. If someone knows how to fix this that would be great.