Win7 Professional x64 16GB (4.99GB usable)

Question

I've installed Corsair Vengeance CMZ16GX3M2A1600C10, 2x8GB, DDR3-1600, PC3-12800, CL10, DIMM and my BIOS picks up that there is 16GB, Windows says there is 16GB, CPU-z says there is 16GB. But it only says I can use 4.99GB out of 16GB.

Supports four unbuffered DIMM of 1.5 Volt DDR3 1066/1333/1600*/2000*/2133* (OC) DRAM, 16GB Max

Windows

(Above screenshot specifies that I am on a System type: 64-bit OS)

CPU-z

Microsoft says that the physical memory limit on a 64 bit win7 professional operating system is 192GB.

Dxdiag Run Command

BIOS Screenshot #1

BIOS Screenshot #2

Why is my OS limiting me to just over a quarter of the available memory? is there anyway to increase it?

Have you checked BIOS to make sure it's not reserving any of it for CPU or something? What motherboard or laptop are you using? Can you update question with this info please? — Sponge Bob, Oct 03 '12 at 03:55
where abouts in the BIOs would I check if any memory is being reserved for the CPU? — classicjonesynz, Oct 03 '12 at 03:56
Hmmm, I'm not exactly sure - it's going to change a lot from computer to computer. Can you try to google your specific computer, or maybe just poke around for a few minutes. — Sponge Bob, Oct 03 '12 at 03:57
Please run memtest, located here, http://www.memtest.org/. Also play around with the DIMM slots and see if there are any problems with the motherboard. Update your question with your results thanks. — pneumatics, Oct 03 '12 at 04:12
[8.00GB RAM (3.22GB usable) in Windows 7 x64](http://superuser.com/q/372751) [Windows 7 x64 reports 8.00GB installed ram, but only 3.47Gb usable](http://superuser.com/q/448664) — Sathyajith Bhat, Oct 03 '12 at 04:18
Thanks Sathya! I set it to 14,000 and I now have 13,000 available woot :D — classicjonesynz, Oct 03 '12 at 04:31
@Killrawr great, please post a detailed answer as to what you did to fix. — Sathyajith Bhat, Oct 03 '12 at 05:40

score 0 · Accepted Answer · answered Oct 03 '12 at 20:49

0

I fixed it on my windows 7 PC by simply going into msconfig -> boot -> advanced options. And increasing the maximum memory and then running a reboot.

answered Oct 03 '12 at 20:49

classicjonesynz

1 Answers1