After 2 years of running this 920 I've finally been struck by the memory bug.
Currently the rig will either boot in two modes. 1.99GB Mem Usable, or 3.99 GB Mem Usable.
Read RJohnson's post, 
 
Edit: Via ELeet it's also showing my memory in Dual Channel Config. 
 
MCH Strap is correct.
Tried the TRL +2 Setting
64Bit? Oh yes, Win7 64Bit
Memory Low Gap actually caused a reboot loop.
Each stick passed when installed one at a time install and with all 3 installed with Memtest.
They also passed in my other X58 Machine.
Even though the 920 has been in that socket over a year I checked it anyway, the pins are good.
It started under an older BIOS (Don't remember which) But newest didn't help either.
 
I've gone down 30 hops on the BClock, didn't make a difference. The OC is still stable which seems odd, but ok. It passed Intel Burntest on all 8 cores for 3hrs.
 
Suggestions?
 
Mother Board ( EVGA X58 Classified E-759 ) 
Drivers ( 1024 ) 
Bios ( 77 ) 
CPU ( 920 C0 ) (with 920's please also add the stepping CO or DO) 
CPU Cooler ( Heat Killer 3.0 ) 
Memory ( Corsair Dominator 1600 8 8 8 24 ) 
PSU ( ABS Tagan 1300, ABS Tagan 800 ) 
GPU ( GTX295+ X 2 GTX260 ) 
Drivers ( 260.99 ) 
Operating System ( Windows 7 64 Ultimate ) 


Frequency Control 
CPU Clock Ratio ( 20X ) 
CPU Host Frequency (Mhz) ( 200 ) 
MCH Strap ( 1600 ) 
CPU Uncore Frequency (Mhz) ( Mhz { 16X } ) 
CPU Clock Skew ( 0 ps ) 
Spread Spectrum ( Disabled ) 
PCIE Frequency (Mhz) ( 100 ) 


Memory Feature         
Memory Speed ( Standard ) 
Memory Control Setting ( Enabled ) 
Memory Frequency ( Mhz / 2:8 ) 
Channel Interleave Setting ( 6 Way ) 
Rank Interleave Setting ( 4 Way ) 
Memory Low Gap ( Auto ) 
tCL Setting ( 8 ) 
tRCD Setting ( 8 ) 
tRP Setting ( 8 ) 
tRAS Setting ( 24 ) 
tRFC Setting ( 88 ) 
Command Rate ( 1t ) 


Voltage Control 
EVGA VDroop Control ( With VDroop ) 
CPU VCore ( 1.33750 ) 
CPU VTT Voltage ( +150 ) 
CPU PLL VCore ( 1.8 (Auto)) 
IOH PLL VCore ( 1.8 (Auto) )  
DIMM Voltage ( 1.65 ) 
DIMM DQ Vref ( +0mV ) 
QPI PLL VCore ( 1.3 ) 
IOH VCore ( 1.2 ) 
IOH/ICH I/O Voltage ( 1.5v (Auto) ) 
**BR04 ( NF200) Voltage ( Auto ) (only on E-759) 
**VTT PWM Frequency ( Auto) 
**CPU PWM Frequency ( Auto) 
**CPU Impedance ( Auto ) 
**QPI Signal Compensation ( Auto ) 
ICH VCore ( 1.15 ) 
*PWM Frequency ( Not Used on Classified ) 


CPU Feature 
Intel SpeedStep ( Disabled ) 
Turbo Mode Function ( Enabled ) 
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 ( 4.800 GT/s ) 
OC Recorvery ( Enabled ) 

PnP/PCI     PCI Express 
Maximum Payload Size ( 512 )  

Hello,
 
Have you tried loosening the heatkiller?
 
It can flex the board causing poor contact.

owcraftsman 

In msconfig > Boot > Advanced Option make sure the radio buttom next to Maximum memory is unchecked. 

 
 
lol, that now has givin me a new memory, 2.99  So now I have 1.99, 2.99 and 3.99 all randomly

EVGA_ShannonR

Hello,

Have you tried loosening the heatkiller?

It can flex the board causing poor contact.
 

Yeah, when I reseated the CPU I dbl checked the HK to make sure I wasn't havin a problem there. 

loveha 

You said you have tried +2 on the tRL, but have you tried +1 and the other settings. I need +1 for mine to show. 

 
 
Yeah, tried that one. No difference..