Originally Posted by Madmaxneo
How much of a difference in performance is there between the 1680v2 and the 4930k I have now? Apparently the average OC is about 4.3ghz and right now I run my 4930k @ 4.2 ghz.
From my experience going from an E5-1650v2 (essentially identical to your CPU) to the E5-1680v2 wasn't earth shattering but it depends on what you are doing.
The additional cache on the 1680v2 will help a bit.. the additional (2) true cores of course will help if they are utilized. 1661 is roughly the score you will get with Cinebench with a decent overclock. This is of course a test that will take full advantage of the 4 additional cores (with hyperthreading enabled). A lot of the games now are taking advantage of more than 4 cores. Streaming while gaming, multi-tasking will all benefit from the additional cores.
Overclocking usually isn't quite as good with the 1680v2 simply because it has 2 more cores to keep cool. If you have a decent chip and sufficient cooling it should hit 4.5Ghz on all cores without much trouble. I was able to get 4.6Ghz on all cores so far but I have not put a lot of time into it to be honest as I just want stability. Gains beyond 4.5Ghz are going to be minimal anyway. Having said that I could get my 1650v2 to 4.8Ghz all cores, benchmark stable only.
Lastly, I think the main reason to upgrade is longevity of the RIVBE. Without this CPU you are going to be limited to 6 cores if you want to overclock. The 1680v2 breathes fresh life into the platform bringing it more into x99 territory and it is also unlocked. Mainstream "desktop" CPUs are now 8-core/16-thread (9900#) and although this CPU is not as fast and cannot overclock as high, the reality is that the performance you will get at the end of the day will be RELATIVE to the 9900#... simply because Intel hasn't really significantly increased IPC and 8 cores/16 threads running at 4.5Ghz is not going to disappoint regardless of the architecture. Keep in mind all the lanes we get with x79.
Or, you could buy a brand new motherboard (equivalent to the RIVBE, so high end), all new memory (you'd need DDR4) a new CPU and maybe even a new cooler to get 8 cores/16 threads... so IMO this is a bargain when you can upgrade to 8 core/16 threads for around $150 total cost..