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Tom's Hardware > Forum > Motherboards & Memory > Memory > Windows 7 64bit shows 3.73GB usable memory with 8GB installed

Windows 7 64bit shows 3.73GB usable memory with 8GB installed

Forum Motherboards & Memory : Memory Windows 7 64bit shows 3.73GB usable memory with 8GB installed

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Kirtaner   02-05-2012 at 04:25:30 AM

I have two sticks of 4gb PNY RAM (8gb total) installed in an Asrock A75M FM1 motherboard with an A8-3850 APU, which supports 16GB of RAM. I've already updated my BIOS, thinking that may be it, but it didn't work.


Windows 7 as well as my BIOS show that 8GB of RAM is installed, but only 3.73 is usable. Another 4375MB shows up in Windows as "Hardware Reserved".


I've looked on the AsRock FAQ which says that on other boards there is a "BIOS / Advanced / Chipset Configuration / Memory Remap Feature", but this isn't in my BIOS (A75M P1.70).


How can I get the other 4GB of RAM to be usable?


http://ompldr.org/vY21ydw

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Nikorr   02-05-2012 at 04:48:41 AM

Hi there, do u have Windows x64bit version?

U need that to address more than 3.25GB RAM.

Message quoted 1 times
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Nikorr   02-05-2012 at 04:54:40 AM

Check your msconfig, make sure that max RAM size is enabled.

http://desmond.imageshack.us/Himg697/scaled.php?server=697&filename=image2bq.png&res=medium

Message quoted 1 times
------------------------------ Where there's smoke, there's fire...

 

Reply to Nikorr

amdfangirl   02-05-2012 at 04:57:07 AM

Nikorr wrote :

Hi there, do u have Windows x64bit version?

U need that to address more than 3.25GB RAM.



He said so in the thread title...

Message quoted 1 times
------------------------------ Dying
Is an art, like everything else.
I do it exceptionally well.
-Slyvia Plath Lady Lazarus
 Reply to amdfangirl
Nikorr   02-05-2012 at 04:58:14 AM

amdfangirl wrote :

He said so in the thread title...


Thanx : )

------------------------------ Where there's smoke, there's fire...

 

Reply to Nikorr

Kirtaner   02-05-2012 at 07:08:20 AM

Nikorr wrote :

Check your msconfig, make sure that max RAM size is enabled.

http://desmond.imageshack.us/Himg6 [...] res=medium


I tried it both with the max ram size disabled (default) and enabled (8192MB). Neither setting worked.

Reply to Kirtaner
amdfangirl   02-05-2012 at 07:30:33 AM

I might be a motherboard problem, update to your latest BIOS/EFI.

 

Also, I would recommend downloading a 64bit Linux live CD to determine whether it is an OS problem or a hardware problem.

 

http://spins.fedoraproject.org/lxde/#downloads

 

There is a task manager application in the "start" -like menu (big blue f)

 

You should see all your RAM there. If not it is a hardware issue most likely.


Message edited by amdfangirl on 02-05-2012 at 07:31:10 AM
------------------------------ Dying
Is an art, like everything else.
I do it exceptionally well.
-Slyvia Plath Lady Lazarus
 Reply to amdfangirl
JamesGTRS   02-06-2012 at 04:39:41 AM

You probably have your RAM installed incorrectly. I have the same board, and had the same problem. You probably have 1 4GB stick in a "blue' slot, and 1 4GB stick in a "white" slot. They both have to be in blue, or both have to be in white. Once I did that, I had all my RAM available.

Message quoted 1 times
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Kirtaner   02-06-2012 at 05:26:06 AM

JamesGTRS wrote :

You probably have your RAM installed incorrectly. I have the same board, and had the same problem. You probably have 1 4GB stick in a "blue' slot, and 1 4GB stick in a "white" slot. They both have to be in blue, or both have to be in white. Once I did that, I had all my RAM available.


My board only has two RAM slots. I was able to get it fixed by switching the RAM around a couple of times (first time didn't work, second time did), so maybe they just weren't seated properly the first 2 times.

Thanks everyone for the responses.

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