I have a sandy bridge ASUS mobo with a i5 2500k cpu. I know my mobo has PCIe 2.0 I currently have dual 560 ti hawks from MSI in there. I want to upgrade to one 760 OC card. Do you think I will have enough to run BF4 on ultra? I have 8 gb of ram and I can upgrade to 16 if need be. I do plan on going to Windows 8 also as I hear there are performance boosts. So do I have enough to not have any bottlenecks at the PCIe area to run a 7 series card and if I get this card do I need to go to the 4gb model or am I ok sticking with 2gb? I am not at home but I believe I have this mobo...
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131819
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131819