So I was thinking about upgrading my pc because I will be getting a new and bigger monitor. Currently i have a gtx 550 ti and was thinking about getting another, however, im not sure if my mobo will use both cards at full speed. I have this mobo: http://www.gigabyte.com/products/product-page.aspx?pid=3897#ov. Another concern I have is about the power supply, currently I have a 450 watt xfx, will I need to buy a new psu to support two gpu or the gtx 560/ti? Oh and I have a i3-2120 cpu, do you think it will bottleneck?
GTX 560: http://www.newegg.com/Product/Product.aspx?Item=N82E16814130664
GTX 560 Ti: http://www.newegg.com/Product/Product.aspx?Item=N82E16814130604
GTX 560: http://www.newegg.com/Product/Product.aspx?Item=N82E16814130664
GTX 560 Ti: http://www.newegg.com/Product/Product.aspx?Item=N82E16814130604