Have you reviewed this page yet? http://www.evga.com/support/motherboard/legacy/  EVGA X79 Dark (150-SE-E789-KR/K2)
 

CPU Compatibility

Part NumberFrequencySandy Bridge-ECore i7 3970X3.50 GHzCore i7 3960X3.30 GHzCore i7 3930K3.20 GHzCore i7 38203.60 GHzXEON E5-26802.7 Ghz/3.5GhzXEON E5-26672.9 GhzXEON E5-26302.3 Ghz/2.8GhzXEON E5-26373.0 GhzXEON E5-26202.0 GhzXEON E5-26092.4 Ghz Ivy Bridge-ECore i7 4960X3.60 GHzCore i7 4930K3.40 GHzCore i7 4820K3.70 GHzXEON E5-2630 v22.6 Ghz/3.1GhzXEON E5-2687 v23.1 Ghz/3.8 GhzXEON E5-2690 v22.9 Ghz/3.8 GhzXEON E5-1660 v23.7 GhzXEON E5-2697 v22.7 Ghz
 

Memory Compatibility

VendorPart NumberSizeFrequencyTimingVoltageSlotADATAAX3U1600GB2G9-2G2GB1600MHz9-9-9-241.75V1+3+5+7, 1+3, 5+7CorsairCMZ32GX3M4X1600C108GB1600MHz8-8-8-241.65V1-8, 1+3+5+7, 1+3, 5+7CorsairTR3X6G1600C8D2GB1600MHz8-8-8-241.65V1+3, 5+7CorsairCMD16GX3M4A1866C94GB1866MHz9-10-9-271.50V1+3+5+7, 1+3, 5+7CorsairCMD8GX3M2A1600C94GB1600MHz9-9-9-241.50V1+3+5+7, 1+3, 5+7CorsairCMX4GX3M2B2000C92GB2000MHz9-10-9-271.65V1+3+5+7, 1+3, 5+7CrucialBLE4G3D213ACE1TX0.K16FD4GB2133MHz9-11-10-271.65V1+3+5+7, 1+3, 5+7G.SKILLF3-19200CL10Q2-64GBZHD8GB2400MHz10-12-12-311.65V1+3+5+7, 1+3, 5+7G.SKILLF3-2133C9Q-32GZH8GB2133MHz9-11-11-311.6V1+3+5+7, 1+3, 5+7G.SKILLF3-17066CL9D-4GBTDS2GB2133MHz9-9-9-241.65V1+3, 5+7G-SKILLF3-12800CL9D-4GBCO2GB1600MHz9-9-9-241.35V1+3+5+7, 1+3, 5+7KingstonKHX21C11T1BK2/16X8GB2133MHz9-9-9-241.6V1+3+5+7, 1+3, 5+7KingstonKHX21C11T1BK2/8X4GB2133MHz9-9-9-241.6V1+3+5+7, 1+3, 5+7KingstonKHX2133C9AD3X2K2/4GX2GB2133MHz9-9-9-241.65V1+3+5+7, 1+3, 5+7KingstonKHX24C11T3K4/16X4GB2400MHz12-14-14-311.65V1+3+5+7, 1+3, 5+7KingstonKHX1866C9D3K2/8GX4GB1866MHz9-9-9-241.65V1+3+5+7, 1+3, 5+7KingstonKHX1600C9D3LK2/8GX4GB1600MHz10-10-10-281.35V1+3, 5+7

Enzocagg
Yes, but I have heard of some cpu's like the 1650 v2 working despite not being on the compatibility list. I haven't heard if the 1650 v1 works or not and was asking if somebody has tried the 1650 v1 before. 

Unless someone post that they have one of the CPU you are asking about and have tested and it works you will have to test for your self to see if they work.
What memory are you going with, is your X79 Dark MB with or without Bluetooth?

Note on the Memory is you should not mix them.

I can confirm that the 1650 V2 works just fine (and OCs like a beast via unlocked multiplier) in the X79 Dark with BIOS 2.13. I would guess that the 1650 V1 would as well.

Enzocagg
Has anybody tested the 1680 v2 and the 2670 in the x79 dark also? 

I've heard mixed reports on the 2670 V1 working on the X79 Dark. Some folks it worked, others it did not. So, I'd call that a "better stay away from it."
 
http://www.cpu-upgrade.com/mb-EVGA/X79_Dark.html doesn't list the 1680V2 either (or my 1650V2), but it might work. You might want to call up EVGA support and check with them to see if they have any data that isn't listed in the CPU compatibility list (which, in the case of the X99, isn't up-to-date at all).

Who exactly tried the 1680v2 with the X79 Dark?