the i7 is basically the hyperthreaded version of the i5 ...that gives the i7 round about a 50% performance boost (in most cases)...however the performance gain in games is really not that significant, if at all...dont upgrade that i5 4430, its plenty fast for next gen gaming, plus i think next gen gaming is going to move away from cpus and focus more on the gpu anyways, since their compute power is alot more significant...so in other words, dont upgrade the cpu...you'll be just fine