[citation][nom]devries j70048[/nom]I think for "gaming only PC"!! I would go with the 4.2ghz quad. I do know about overclocking but with stock fan forget it. I don't not know about the 8120 and 8150 being the same. If I had a grand to spend, now knowing that I would get the 8120 and a good fan. Then overclock it. If I was spending a grand I would get the 8 core, 1tb drive or even a 2tb drive and 16gb of ram. I know its "overkill", but I would get it just because with a grand I can. I am not a Intel hater, but when AMD has an 8 core for the same price as the 4 core intel. I have to ask my self, Why not the 8 core? Also the ram, only 4GB come on, the 8gb kit is only $4 more. I am using newegg only for the price.[/citation]
Problem with 8 cores is that you're lucky if a game uses even half of them decently, let alone very effectively. Games tend to not even effectively utilize four cores and other than BF3 MP, no games that I'm aware of can even really benefit more than a few percent by going beyond four cores and even BF3 stops at six. This is why I'd disable one core per module for a gaming machine. It offers a significant boost in performance per Hz due to the module now not needing to share it's resources between two integer cores and it increase power efficiency even more than performance per Hz because not only does it increase performance per core by 20%-30% or so without increasing power consumption, but it also decrease power consumption significantly due to the lower core count and the extra cores not being mere wastes of power consumption because the games and such can't even use them anyway.
Also, the stock FX fan actually does an excellent job of cooling. You can easily take the 4100 and even the 8120 past 4GHz with it. It's not nearly the quietest CPU cooler, but it's still capable of doing some very good cooling. It's not like Intel's crap fans that can't handle much overclocking if any at all.