I know this thread is a few days old but ill way in my two cents lol. I myself have i7 990x with 12gb of ddr3 and a gtx 1070 and when benchmarked against my cousins system with an I7-5930k when it came to gaming and let me restate "GAMING" only there was no noticeable difference in gaming performance and watching my gpu usage it sat at 100% all times. Upgrade your video card and enjoy your system for awhile to come. If there is a bottleneck its so small you cant see it with your eyes while playing.