Originally Posted by
Akaihiryuu
There isn't anything you can upgrade the 3570k to that would make a difference in WOW. Even the 4690k is only a little bit ahead of it, and that's only due to having a higher clock speed. If you get a decent cooler, you can OC a 3570k to 4 GHz easily and match the 4690k.
The i7's (3770k/4770k/4790k) won't make ANY difference in WOW. They can make a difference in things that use a lot of threads (that can take advantage of hyperthreading), but WOW doesn't. Haswell actually had very very little performance gains over Ivy Bridge. The only real difference of Haswell is moving the VRM from the motherboard to the CPU die, and decreasing power consumption slightly. They don't really perform any better, and Ivy Bridge actually overclocks easier than Haswell. You can easily match a 4690k (the best chip for WOW at this time, since it performs identically to the 4790k and WOW doesn't use many threads) with a 3570k by overclocking.