4GB RAM Installed, Windows only uses 2.5GB

Sassafrassas · Oct 25, 2014

Recently, I've noticed some slow system performance. I currently have 4GB RAM installed in my system (2GB Sticksx2), but in my Windows System Properties menu, it reads that I only have 2.5GB installed (2GB usable).

I have reseated my RAM, and switched their slots, but this did not fix the problem.

I know that it is not a motherboard limitation, as my motherboard supports 8GB RAM.

I want to know why my OS is reading that I only have 2.5GB, and if this is effecting my system performance at all.

As an added note, I recently set up Dual monitors on my PC, and if this would noticeably effect my system performance.

Thanks in advance.

Lvcoyote · Oct 25, 2014

What OS are you running?

Sassafrassas · Oct 25, 2014

Windows 7 Ultimate

trekky · Oct 26, 2014

what is the BIOS reporting?

Sassafrassas · Oct 26, 2014

2GB(2048MB) installed.

Lvcoyote · Oct 26, 2014

64 bit or 32 bit OS? Can you also provide a list of system specs?

Sassafrassas · Oct 26, 2014

I am currently using a 64bit OS.

MOBO: ASUS M5A78L-MLX
Processor: AMD Phenom II X4 955 Processor 3.20GHz
Graphics Card: AMD Radeon HD 6700 Series
Power Supply: Antec VP-450 450watt
2xSDD SATA Drives

I am not exactly sure how to see what brand of model of RAM I'm using, but its 2 sticks of Consair Brand 2GB RAM

ATMINSIDE · Oct 26, 2014

Is the integrated GPU turned on?

theELVISCERATOR · Oct 26, 2014

I go with ATM's answer, running discrete video cards? or onboard?

ATMINSIDE · Oct 26, 2014

theELVISCERATOR said:
I go with ATM's answer, running discrete video cards? or onboard?

He's got a discrete card, but the integrated could still be enabled (which would use system RAM).

Sassafrassas · Oct 26, 2014

Apologies, I am not exactly sure how to check if my integrated is on or not.

Attached is a picture of my GPU properties. I hope you can make better sense of it than I can.

ATMINSIDE · Oct 26, 2014

In the BIOS, not in Windows.

Go to Advanced -> Chipset and you'll find the settings in there.

Sassafrassas · Oct 26, 2014

Under Chipset, there is an option labeled Internal Graphics. Under Internal graphics, there are 4 options:
Primary Video Controller
UMA Frame buffer Size
Surround View
Frame Buffer Location

How should I proceed from here?

ATMINSIDE · Oct 26, 2014

Nothing that says Internal Graphics Mode?
Anything that has an option for "Disable"?

Sassafrassas · Oct 26, 2014

No, only the options listened above. If it is any help, I have the American MegaTrends v.1303 BIOS.

ATMINSIDE · Oct 26, 2014

Go ahead and update your BIOS, looks like the newest is 1603.

Sassafrassas · Oct 26, 2014

After updating my BIOS to the latest version (v.1701), the options still remain as listed above.

Mr.Scott · Oct 26, 2014

Under Primary Video Controller, select GFX0 first.

Sassafrassas · Oct 26, 2014

Its already selected as GFX0 first.

Mr.Scott · Oct 26, 2014

Under surround view, can you disable?

4GB RAM Installed, Windows only uses 2.5GB

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