MhzManiac
I have experienced the same problem when I took my overclock 1 notch too high. I know you are Prime stable but what about Intel stress test or Intel burn test?  I use the burn test myself and let it run for at least 10 cycles. You might find you too are just slightly above your max. With the added stress of other components the system will crash.
Just in case what GPU driver are you currently running? 376.53 is working very well in SLI; the prior driver had some SLI issues with COD Infinite Warfare.

MhzManiac
Looks like PCI has it's own clock setting so OCing cpu should not directly effect that bus.
 

bill1024
If your ram is at 1600 the uncore should be set to around 3000-3200.
I am sorry I did not see what you said the ram speed is at? CPUz will give both those speeds on the memory page.
What is the VVT voltage? EVGA does that setting in BIOS like +150mv, what is it set at?
 
How much overclock is on the GPUs?
 

bill1024
Sorry about all the questions.
 
Nice looking rig by the way.
 

sicminded

bill1024
Going over posts I do not see what your CPUv is set to? and what is it under load in CPUz?
You have it set to no vdroop right?
 

vcore is set to 1.3375 in bios, under load cpuz reads it as 1.352, no vdroop.
 

bill1024
Yeah I know it says 1.5, but I never could run it that low. Gave instability when it was low.
Bump that baby up to 3032, that is 2x ram speed.
 
Base default Volt on Classified, classified3 and FTW3 VVT is 1.2v  so  +125mv should be 1.325  You can set it to +125 if we need to.
Base default volt on non classified regular boards is 1.1V
I do not trust the read out volts on HWM If it was me I would not worry about going to 125 or even 150MV.
 
I have two FTW3 and a Classified3 and a couple Asus x58 all running xeons.
Have had real good luck with these CPUs and boards.
 

just crashed at 2x ram speed, about 38 minutes in.
 
I have all of the different settings in a spreadsheet, earlier was crashing about ~15 minutes, don't know if we can call it a trend, but after upping some of the voltages (IOH, QPI, ICH), crashing around ~30 minutes.  In other words, maybe upping some of the voltages is helping.  Well it was also the same time i loosened ram timings.
 
Afraid of bumping VTT too high, read somewhere that 32nm cpu's shouldn't be ran more than 1.35V.  I know you said hwmonitor is not accurate, but at +100 VTT, seeing 1.341 right now (jumps to 1.352 under load).
 
Going to call it a night, more testing tomorrow.  Below is where i ended it at:
 
Frequency/Voltage Control
Dummy O.C   =  disabled
Extreme Cooling   =  disabled


CPU Feature
CPU Clock Ratio   =  21
CPU Host Frequency (Mhz)   =  190
MCH Strap   =  auto
CPU Uncore Frequency (Mhz)   =  16x (3045mhz)
CPU Clock Skew   =  0 ps
IOH Clock Skew   =  0 ps
Spread Spectrum   =  disabled
PCIE Frequency (Mhz)   =  100
OC Recovery   =  disabled
Turbo Performance   =  disabled

Memory Feature       
Memory SPD   =  standard
Memory Control Setting   =  enabled
Memory Frequency (2:X )   =  8
Channel Interleave Setting   =  6
Rank Interleave Setting   =  4
Memory Low Gap   =  3
tCL Setting   =  9
tRCD Setting   =  9
tRP Setting   =  9
tRAS Setting   =  25
tRFC Setting   =  auto
tREF Setting   =  auto
Command Rate   =  2T

Voltage Control
EVGA VDroop Control   =  without vdroop
CPU Vcore   =  1.3375
CPU VTT Voltage   =  100
CPU PLL Vcore   =  1.995
IOH PLL Vcore   =  1.89
QPI PLL Vcore   =  1.2
DIMM Voltage   =  1.6
DIMM DQ Vref   =  0
IOH Vcore   =  1.2
IOH/ICH I/O Voltage   =  1.6
ICH Vcore   =  1.2
NF200 Voltage   =  1.2
VTT PWM Frequency   =  250
CPU PWM Frequency   =  800
CPU Impedance   =  auto
QPI Signal Compensation   =  auto


CPU Feature
Intel SpeedStep   =  disabled
Turbo Mode Function   =  disabled
CxE Function   =  disabled
Execute Disable Bit   =  disabled
Virtualization Technology   =  disabled
Intel HT Technology   =  enabled
Active Processor Cores   =  all
QPI Control Settings   =  enabled
QPI Link Fast Mode   =  enabled
QPI Frequency Selection   =  4.8