Re: GA-X58A-UD7 rev 2 memory / uncore OC stability trouble.
I don't think you are going to get any further than you already are without taking any risks...
running the memory beyond 2000Mhx on an x58 is very difficult and really requires a near golden chip.
also an 0x124 usually means that the QPI voltage is too high or not high enough and seeing that you are at 2002Mhz and you are below 1.5v I'm going to say you are not high enough.
on my previous GA-X58A-UD5 v1.0 board I was not able to achieve 2000Mhz unless my CPU was running at stock freq (920, so 2.66Ghz) then I was able to increase my mem ratio and uncore to get to 2000Mhz (my ram is 2000Mhz at 9-10-9-27-1T) but I had to have my QPI voltage at 1.52v to keep the system stable. My CPU was at 1.20v-1.25v
This is what I required for Prime95 blended testing stable for 6 hours. but my loaded temps with my H70 was near 85 degrees C. and I had better fans in there as well. Stock fans had me at 95 degrees C.
if your temps are good and as you are getting 0x124 BSOD's increase your QPI voltages 1 tick and see how things go.
as for the remainder of your settings I don't see an issue... as for your PCIe voltage bump I don't see any relation to that adding any stability under the OC conditions you are experiencing, with only 1 external PCIe device I don't see a reason to have that beyond the stock 1.5v.
OS = Win8.1
CPU = i7-980X @ 4.17Ghz 144x29 cooled by custom Loop
Mem = 12GB 2000Mhz corsair Dominator GT at 2010Mhz @ 9-10-9-27-2T
MB = Gigabyte GA-X58A-UD5 v1.0 with F6 Bios - Dead Board
MB = EVGA X58 Classified3 e770
GPU = Sapphire r9 290x
HD = 2x Toshiba 120GB Raid 0 (580MB Read/140MB Write)
Storage = 2TB WD Black
PSU = Corwair TX950W
Case = Cooler Master HAF-X 945
HTPC / Home Server
OS = Win7 64Bit running XBMC HTPC Front end with Windows Server 2011 Virtual Machine with 8GB ram assigned for homer server with exchange
CPU = AMD 1090T
Mem = 16GB 1600Mhz Kingston RED Limited Edition running at 1600Mhz
MB = Gigabyte 790FXTA-UD5
GPU- EVGA GT210
HD = too many to count, but about 5TB of storage all together including backup
PSU = Corsair TX750
Case = Too embarrassed to mention.
Benching MB's... Asus P5Q and Gigabyte 890FXA-UD7... too many CPU's and RAM sticks to list. :)