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Windows 7: 16 GB RAM - 15.7 GB usable 4GB RAM 2.7 GB usable ???

30 Jul 2011   #1

Linux CENTOS 7 / various Windows OS'es and servers
16 GB RAM - 15.7 GB usable 4GB RAM 2.7 GB usable ???

Hi there
What gives

I uppped the memory of an ASUS Motherboard to 16 GB - no extra video card or whatever from 4GB --running W7 X-64 Enterprise version (approx equiv to W7 Ultimate). 4GB memory chips are CHEEEEEEEAP currently so why not upgrade !!.

I now get in the properties Usable memory 15.7GB (installed memory 16 GB). Fine by me.

When I had 4 GB installed the memory status showed 4GB of which 2.7GB was usable.

Why the difference in usable memory -- the BIOS or internal video hasn't changed.


Attached Thumbnails
16 GB RAM - 15.7 GB usable   4GB RAM 2.7 GB usable ???-computer.png  
My System SpecsSystem Spec
30 Jul 2011   #2

Windows 7 Ultimate x64

I would go into Task Manager, than Resource Monitor, then the memory tab and see what's up. I wouldn't expect you would see the difference.

Quote   Quote: Originally Posted by jimbo45 View Post
4GB memory chips are CHEEEEEEEAP currently so why not upgrade !!.
Since you asked the question.
#1). Because you likely won't need it, and performance won't change. Unless you run concurrent virtual machines with large amounts of RAM.
#2). Filling up RAM slots can make things like overclocking more of a challenge.
My System SpecsSystem Spec

 16 GB RAM - 15.7 GB usable 4GB RAM 2.7 GB usable ???

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