Windows not recognising all of my RAM?

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Ben McKinlay

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Nov 8, 2013
36
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10,530
Hi

I have Windows 8.1 Pro x64 on my PC, according to Control Panel System tab. There, it says I have 6GB of installed memory, of which 4GB is usable. Now, I didn't see why this should be the case, so I open up CPU-Z, which tells me I have 8GB of RAM, 2x4GB. My motherboard is a GA-880GM-USB3, which according to Gigabyte's website can support up to 16GB of RAM. My processor is a AMD FX-8120.
How can I get Windows to recognise my full amount of RAM?
 
Solution
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I had the same problem on a Gigabyte board GA-H55M-SH2 socket LGA1156 and so did many others with boards with the Intel H55 chipset---just checkout the forums.
My bios ,showed the correct total of ram--2x4gb---BUT it showed one of the DIMM slots as Disabled.
In win 7 64 bit ultimate, it showed as 8gb installed but only 2.96gb useable.
THE PC RAN OK BUT ABOUT ONCE A WEEK IT WOULD FREEZE UP.
Tried everything like many others on the net but could not fix it.
BUT NOW IT'S SOLVED.
My problem was caused by the contact fingers in the LGA1156 CPU socket on the motherboard, not contacting the contact pads on the bottom of the processor when it was installed in the socket.
When you looked at the fingers in the socket they all looked in line and...
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Ben McKinlay

Honorable
Nov 8, 2013
36
0
10,530
The BIOS seems pretty useless compared to my other PCs, so I have no idea how to work the thing. It does mention something about base memory 600K(approx, I forgot to note down the exact amount) and extended memory 4096M, if that helps.

Task Manager is still saying 6.0 GB Unknown, with 1.7/4.0 GB used at this particular moment. CPU-Z is still saying I have 8GBytes of memory.

I've doubled checked and "Maximum memory:" is definitely unchecked.

Any other ideas?
 
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browser243

Reputable
Dec 27, 2014
4
0
4,520
I had the same problem on a Gigabyte board GA-H55M-SH2 socket LGA1156 and so did many others with boards with the Intel H55 chipset---just checkout the forums.
My bios ,showed the correct total of ram--2x4gb---BUT it showed one of the DIMM slots as Disabled.
In win 7 64 bit ultimate, it showed as 8gb installed but only 2.96gb useable.
THE PC RAN OK BUT ABOUT ONCE A WEEK IT WOULD FREEZE UP.
Tried everything like many others on the net but could not fix it.
BUT NOW IT'S SOLVED.
My problem was caused by the contact fingers in the LGA1156 CPU socket on the motherboard, not contacting the contact pads on the bottom of the processor when it was installed in the socket.
When you looked at the fingers in the socket they all looked in line and perfect---BUT somehow quite a few never contacted the processor pads and if you looked carefully at the pad you could see they were perfectly smooth with no evidence of contact scratching or indent.

After carefully bending the contact fingers up a bit and re assembling the PC with the 2x4gb ram sticks everything in the bios showed correctly 8gb' 2x4gb both dimms activated and in win 7 it showed as 8gb available/useable.

The PC has not frozen up since.

Hope this gets out on the web to help people who are having weird problems on some of the older boards---check the bottom of your processor for signs of contact marks on every gold contact pad.
 
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