i'm not going to overclock it... maybe i5 4440 ? is it still bottleneck ?
Nah you are good with that i5. If you don't overclock, consider the i5 4690 non k version. Or even better, the Xeon 1231 which is basically an i7 4770 and the price of an i5. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
There is the potential for a bottleneck there. Usually its with these high end cards when you see the i3 bottle-necking GPU's. I would highly recommend getting a i5 4690k.