NO it won't be a problem,i have a i5 750 @4.184ghz and i can get 100fps plus on bf4 at 1080p, the difference between the newest i5's and the oldest i5's is the amount of electricity they use and the max overclock you can get out of them. It sounds like your only using a 60hz monitor so there is no chance of it being a bottleneck as long as you've got it overclocked to 4.0ghz you wont need a new processor until intel release something as difference to the i5's as they were to the Quad duos they replaced from the 775pin days,fuck it get yourself a solid state drive and a gtx 670 flash its bios to 1.3ghz and you'll be right for 1080p 60hz for ever.