Okay guys, I have an ASUS M4A87TD EVO AM3 AMD 870 mobo; it has 2 PCIe 2.0 x16 Slots.... and a XFX Radeon HD 6870 1GB 256-bit gpu. Do you think I would get more performance with a crossfire setup, or going out and buying a XFX HD Radeon HD 6970 2GB 256-bit? I have never crossfired before so I am a complete noob at this. Let me know if you need any more details on the gpu's. Thanks in advance.