The questions I would ask myself are: What do I expect to gain from this upgrade, and...does my computer do what need it to do now, without the upgrade?
All said and done, even with all the up-grade, your gaming experience may not change much....... I was gaming a few months ago with an I5-760, and loved it! I upgraded too.......and in fact, wasted my money. I saw no improvement at up-grading to an I7 cpu, even with hyper threading, etc, etc..... My system is no better than it was. the speed increase wasn't even enough to notice without a benchmark. My advice......If your computer deos ok now, then just up-grade to 8gb of ram. I do believe that will do you some good. If your computer simply doesn't do what you want with your exisitng cpu, then sure.....up-grade. But, do your homework. There are a lot of great pu s out there that dont have to cost so much. When you compare the speed increases witht he cost involved.....it's just a huge waste of money. good luck