I have no idea why people are recommending APUs when you have a discrete graphics card. As said directly above, get an Athlon X4 CPU, i.e 8[#]0k or 7[#]0k.
This one is quad core and has 4 times the L2 cache and a higher clock frequency. (So it's better all around and should work fine with a 260x)
https://www.newegg.com/Product/Product.aspx?Item=N82E16819113402#close
I have no idea why people are recommending APUs when you have a discrete graphics card. As said directly above, get an Athlon X4 CPU, i.e 8[#]0k or 7[#]0k.