I have a 1 x XFX Double D FX-787A-CDFC Radeon HD 7870 GHz Edition 2GB 256-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX gpu and while playing assassins creed i only manage a constant fps of 25? This was my first pc build and I am wondering what I can do to increase my fps. I am also running a AMD fx-6100 overclocked to 4 ghz on an a ASUS M5A97 LE R2.0 AM3+ AMD 970 ATX AMD Motherboard. If anyone can give me some ideas on how to increase my fps it would be greatly appreciated.