Lynnfield i5 to Haswell i7

I am currently running a system around a Lynnfield i5 overclocked to 4.0 GHz on a single 1080p display and a GTX 275 and am pretty ok with the performance. My question is that I am in the process of putting together a Haswell i7 4790K clocked at 4.0 GHz but I want to move to a three monitor display. My question is whether the i7 4790 with a GTX 9700 over three monitors will give me at least the performance of the i5 4.0GHz system on a single 1080p display?

Thanks,

RH