Need help for a new CPU

[God601]

But why not Ivy-bridge? So: Core i7-4xxK Extreme Edition

I think they cost almost the same (if one counts in $100-steps)

Are they better than the 3rd generation?

[nintendo85]

Ivy Bridge is just fine. There are no major advantages Haswell has over the last generation.

[NarooN]

Ivy Bridge is on average 5% faster than Sandy, so it doesn't really matter which one you get. I know that Sandy Bridge was a better overclocker than both Ivy and Haswell, though I'm not sure if this applies to the Xeon-based Extreme chips.