Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Windows 7 - 8GB ram only 3.99GB usable

03 Sep 2012   #1

Windows 7 Professional 64bit
Windows 7 - 8GB ram only 3.99GB usable

Windows 7 Professional 64 bit - Has 8gb of ram (4x2gb), but system is only showing 3.99 usable. (Asus p7p55d board, Intel Core i7 860 - 2.80ghz)

Slot 4 has a different 2gb card in it than the others (though still corsair)

I've attached some CPUz SPD snips


ImageShack® - Online Photo and Video Hosting
ImageShack® - Online Photo and Video Hosting
ImageShack® - Online Photo and Video Hosting
ImageShack® - Online Photo and Video Hosting
ImageShack® - Online Photo and Video Hosting

My System SpecsSystem Spec
03 Sep 2012   #2

Windows 7 Ultimate 32 bit OEM

I had this problem. Is it an old computer? Please share all your specs?
My System SpecsSystem Spec
03 Sep 2012   #3

Windows 8 64bit

Have you reseated all the ram or used memtest?
You're 100% sure you're in 64-bit and not 32-bit?
Does BIOS show all 4 sticks?
My System SpecsSystem Spec

03 Sep 2012   #4

Windows 10 Pro. EFI boot partition, full EFI boot

Well they seem to be all recognized by the BIOS as they are all seen in the memory tab.
Make sure memory remapping is enabled in the BIOS. It should have been by default tho.
My System SpecsSystem Spec
03 Sep 2012   #5

Windows 10 Pro

Make sure the Maximum memory box isn't checked...

In the search box tyep "msconfig" (without quotes) click "msconfig.exe", click "Advanced Boot Options" and make sure the "Maximum Memory" box isn't checked. If so, un-check it. You'll probably have to re-boot after that. Then see what it says for memory.

That box actually limits the amount of memory the system uses, especially on a 64-bit OS.
My System SpecsSystem Spec

 Windows 7 - 8GB ram only 3.99GB usable

Thread Tools

Similar help and support threads
Thread Forum
8.00GB and only 3.99GB usable
I had my i5 OC'd but it was unstable so just went back to defaults. I recently took out my CPU to reapply some thermal paste and then reinstalled it. My PC now posts then reboots and then starts normally but its only using 4GB of ram. I checked msconfig and maximum memory isn't checked. ...
Performance & Maintenance
6GB of RAM installed, only 2.99GB usable
Hello, I really want to use NVIDIA Shadowplay but it is showing that apparently I have 3GB of RAM installed and 6GB usable. What can I do? I've attached the image of it. Thanks, Lachy
Hardware & Devices
4gb installed 1.99gb useable???
ok guys i have been all over the internet reading tons of forums trying to fix this problem. a while back when i had my computer it use to read all my ram, but up till about a month ago i had to rma it due to a mb catching on fire. anyways they replaced the parts and sent me a new computer...
Performance & Maintenance
12GB ram only 3.99GB usable
i recently installed 2 x 4GB ram chips but my pc doesnt "use" them. Im running windows 7 64 bit. any advise on how to make the ram work?
Hardware & Devices
Windows 7 Ultimate x64 ram 4GB 2GB only usable
Hello I am having a big problem with Windows 7 Ultimate x64 It uses only 2 GB of 4GB These advantages of my computer intle core i7 2.9 cach 8MB ram 4 GB DDR 3 pass 1366 motherboard intel DH55TC
Hardware & Devices
12gb ram (9.99gb usable)
I have win 7 home premium x64, Asus P6X58D Premium, core i7 920, 12gb wintec ind. AMPX 1333mhz ram and in my computer >>properties it shows 12gb ram (9.99gb usable). What do I have to do to get this right. All DIMMS work, if I run only 5 I get 10gb I have tried switching it up I'm not sure one of...
Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 12:11.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App