RAM Memory Issue (16 GB installed 12 GB usable) Solved

Question

Hello, sorry if the question has already been asked, but I didn't understand the other posts so I'm turning to you. I just noticed while configuring After Effects that I only have 12 GB of RAM available out of 16 GB installed.

Indeed, in the BIOS, all my RAM is detected 'Total Memory: 16384MB' and all 4 memory slots are recognized.

Windows is telling me 16 GB installed (12 GB usable)

The problem is recent (I've always had 16 GB of RAM available) and I don't understand why this limitation came out of nowhere.

My configuration

- Motherboard: 990 FX Extreme 4 P1.50
- RAM: 4X4 GB Corsair
- CPU: Amd FX 8120 8 Core 3.10 GHz

Looking forward to your response.

Flogger · Accepted Answer

Hi

In general, Windows is to blame. But that's just its "normal" operation; Windows indeed reserves memory addresses for peripherals.
Either it's been this way since installation and you didn't notice it, or you later installed expansion cards (other than the graphics card) and Windows shifted the memory addressing, rendering part of it unusable. Or your Windows is unofficial...

There's not really a solution to fix the problem (which isn't really a problem). Reinstalling Windows often allows you to reuse what's been marked as unusable, but that's not guaranteed.

Darknet37 · Answer

Thank you for your response.

However, I still find it strange, as I mentioned, I have always been able to use my 16 GB of RAM, it is only recently that I noticed this lack of 4 GB.

You mention the installation of 'expansion cards', what do you mean by that?

* I recently changed cases to a Cougar Evolution, could this be coming from the top slot for the quick connection of a hard drive? (Image below)

https://www.vr-zone.net/

passi · Answer

Le problème, c'est peut-être au niveau du BIOS. Il faut que tu achètes une pile 2032 pour le BIOS, que tu attendes 8 minutes sans la pile, et que tu mettes la nouvelle pile au démarrage. Il va afficher un message, appuie sur la touche F1 et normalement ça sera résolu. J'ai eu le même problème, tu me diras si ça marche.

passi · Answer

And a trick I think that doesn't come from Windows, if you have the 64-bit version, it has nothing to do with it.

Darknet37 · Answer

Thank you, Passi, for your response. I will go buy this battery in question and I will get back to you to give you the result ;)

Dan · Answer

And then??

Darknet37 · Answer

For my part, I was able to resolve my problem:

1 - Click on the Start button, type msconfig in the search programs and files box, then click on msconfig in the Programs list.

2 - In the System Configuration window, click on Advanced options under the Startup tab.

3 - Uncheck the Maximum memory checkbox, then click OK.

4 - Restart the computer.

Source: https://support.microsoft.com/fr-fr/help/978610/the-usable-memory-may-be-less-than-the-installed-memory-on-windows-7-b

RAM Memory Issue (16 GB installed 12 GB usable)

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