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: 12GB ram only 3.99GB usable

14 May 2011   #11

windows 7 professional 64 bit

thanx ill try that now... the samsung was a shipping error. and the trancesends will be out as soon as i get the 4gb chips up and running

My System SpecsSystem Spec
14 May 2011   #12

Windows 7 64 bit SP1

As DocBrown says, you have to install memory of the same type in the same channels. Channels run 1/3 and 2/4, so when you have only two sticks installed you place them in slot 1 and 3, and when you have four, you place the 2GB's in slots 1 and 3, and the 4GB's in slots 2 and 4. Typically, most motherboards color code these slots, meaning you install the pairs in the same color slots.

Also, as DocBrown says, your 4GB's chips are from two different manufacturers. The timings look similar, but that might still cause a problem. First, put your sticks in the right slots.
My System SpecsSystem Spec

 12GB 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
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 Thanks! ImageShack® - Online...
Hardware & Devices
Windows 7 12GB Installed (6GB usable) assistance
I recently bought another set of RAM to extend my system from 6GB to 12GB. However when I checked my system info I got the above title. Below is my system information already reset the CMOS but that didn't work. Also in msconfig max memory is unchecked. RAM: Corsair XMS3 6GB - 3x2GB DDR3 (2...
Hardware & Devices
12GB RAM only 8GB usable
I'm a newbie to posting in a forum, so I hope I give all the needed information. Last weekend I transferred all my "parts" from one case to a new one. When I checked "System"... I noticed under Installed Memory (RAM) 12.0 GB (8.00 GB usable). I found and tried a couple ideas on the internet to...
PC Custom Builds and Overclocking
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 21:32.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App