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Windows 7 does not recognize all my memory

Tags:
  • Memory
  • Windows 7
  • Corsair
Last response: in Memory
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August 13, 2011 7:49:50 AM

I have a ASUS Sabertooth X58, Core i7 950 CPU and 12 GB of DDR3 Corsair CMD12GX3M6A1600C8 memory and a Corsair 1200 power supply. CPUID reveals 12288 MB or RAM but Windows 7 (Professional) shows only 8 GB. I have the RAM set for 1.65 V in the Bios. This is a triple channel board.

More about : windows recognize memory

August 13, 2011 7:57:42 AM

Did you install the 64-bit or 32-bit?
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Best solution

a b } Memory
a b $ Windows 7
August 13, 2011 2:04:20 PM

He installed 64bit because it shows 8GBs. If it was 32bit he'd show 4GBs or less.

Double check the ram one at a time to make sure they all work and you don't have any dead sticks/slots. PITA but its the first step.
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August 13, 2011 8:15:10 PM

I suppose that is inevitable, but how can CPUID find the installed 12288 MB when the operating system cannot?
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August 14, 2011 7:30:03 AM

This is how the cow ate the cabbage: I wiggled the CPU cooler a little to see if I could get it to make proper contact with the MB. BAD...the BIOS started to reboot three times before allowing the operating system to engage. SO I unscrewed the CPU cooler, removed the CPU, cleaned it up, reseated it, applied new thermal grease and reinstalled the cooler, this time, using some tiny washers I had obtained to better protect the back of the MO...missing in the kit. Fired it up and presto! All 12 GB memory now visible in the system.
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August 14, 2011 7:30:47 AM

Best answer selected by ramcooker.
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a b } Memory
a b $ Windows 7
August 14, 2011 7:40:11 AM

Ram stick making partial contact then? Odd that some would see it and others not.
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August 14, 2011 7:52:10 AM

Well, all sticks are good because I tested them all in the system and because they are all working now. The CPU was not making good contact with the motherboard. I think it could reoccur. My large, aftermarket CPU cooler places irregular pressure on the CPU socket. This may account for the error.
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