If you have virtulization on in bios it allocates memory for that. so make sure that is turned off.

raw2dogmeat

Re:Windows 7 usable memory :( - 17 hrs. ago ( #4 )



I found the fix somewhere, don't remember, but click "start", type "system configuration", click "boot", click "advanced options", (make sure "number of processors" is CHECKED  and set to maximum available) and to the right of that box make sure "maximum memory" is UNCHECKED... took me hours of searching to find this out last weekend (I almost did a Windows 7 reinstall before I found the fix) That fixed my problem, boots faster with "maximum processors" set to highest, and most importantly I discovered my memory was not bad as others led me to believe...  Hope this fixes your problem!

didnt work



, i gotta go try this virtualization thing in bios and turn it off.  not sure what its under but im lookin now...

Question...I left a couple of the mounting screws off of the motherboard.  Would this have an effect on this????  Could it not be properly grounded or something thus not letting all the memory be used?  I don't know much about what the function of using all the mounting holes are.  

I had the same problem~

Did everything you did~

Was a bad stick of ram in the end~

Rma'ed 3 sets~

lot's of threads like this out there, many EVGA, but I have seen other board mfg listed. Almost always corsair memory at 1600

I can temporarily "fix" by reseating RAM or Processor.

I am having this exact same problem....
 
Can anyone please post a picture after they fixed this showing 6gb ram(6gb usable)?
 
Anyway, I am going to try to trouble shoot it. 
 
I have the Corsair Dominator 1600.  I7 920 windows 7.  I am getting that exact same message and its driving me nuts. 

well i have the same problem but yes i need VT and no i do not believe that is doing it because sometimes the system comes up with 3gb in bios on some boots and others not but i will try to disable VT.
but normaly VT has nothing to do with it. its the 64bit option in bois and mem remaping that allows you to get full ram support above the 3GB limitation. normaly VT has nothing to do with that. i will try but as i said this does not happen every boot.

Well documented problem, most likely with multiple etiologies. Here are some potential fixes. I would try them in this order:

1) Set MCH Strap to DRAM Ratio
2) Set CPU VTT to 100-150mV
3) Turn off XMP Profile
4) If you have bios 73, try setting the very last memory option, "tRL" to +2
5) Set DRAM Voltage to 1.65, and QPI PLL to 1.35
6) Reseat your CPU ensuring that the pressure on the mobo is good, and the pins are not bent -- you can check the bottom of the CPU: Looking at the metal "plates" which make contact with the mobo pins will tell you if they are all centered, or if some are not centered. - THIS SEEMS TO BE THE MOST COMMON FIX.
7) Reseat your RAM, and ensure that it is snapped into place properly.

GL!

jose1980

Vihsadas

Well documented problem, most likely with multiple etiologies. Here are some potential fixes. I would try them in this order:

1) Set MCH Strap to DRAM Ratio
2) Set CPU VTT to 100-150mV
3) Turn off XMP Profile
4) If you have bios 73, try setting the very last memory option, "tRL" to +2
5) Set DRAM Voltage to 1.65, and QPI PLL to 1.35
6) Reseat your CPU ensuring that the pressure on the mobo is good, and the pins are not bent -- you can check the bottom of the CPU: Looking at the metal "plates" which make contact with the mobo pins will tell you if they are all centered, or if some are not centered. - THIS SEEMS TO BE THE MOST COMMON FIX.
7) Reseat your RAM, and ensure that it is snapped into place properly.

GL!

 


I had the same issue with Ram missing. I had 3.00GB (1.99) usable. and out of that list that you posted, #6 was the one that worked for me.  thanks!

No problem. :) If it happens again, try easing up on the heatsink pressure. I had to do it twice to get mine to work properly...these are the woes with having an on-chip IMC... :p