Windows assigning 4GB of shared Video Memory to my dedicated GPU

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I was wondering if there was a way to change the amount of Shared Video Memory automatically allocated to my GPU.

ASUS Prime H310M-A

Intel i5-8400 @ 2.80 GHz

R9 380X @ stock settings

8GB Corsair DDR4 2400MHz Memory

Windows 10 Professional

It's currently allocating 4GB of Shared Video Memory.

This is problematic for me as I only have a single stick of 8GB Memory, and I need System RAM over Graphics Memory.

Due to this automatic 4GB allocation of video memory (total 8GB), it causes some applications to run into the paging file making them slower.

I've looked in the BIOS and I can't find any setting which could tweak this. Does anybody know how to change the amount of allocated shared video memory?

Civ

Posted 2019-03-10T16:09:08.780

Reputation: 1

A page file will be used regardless if you disable shared memory function. You typically can do that within the firmware settings of the motherboard. – Ramhound – 2019-03-10T16:24:22.977

Shared memory is not necessarily allocated memory. It might be used if you run a particularly demanding game or GPGPU task, but chances are the memory is not used at all. You almost certainly have not been using the full 4GB. Where are you seeing this value for shared memory? – Mokubai – 2019-03-10T16:59:36.257

Answers

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The numbers don't add up: The ASUS Prime H310M-A specification says : "Maximum shared memory of 1024 MB (for iGPU exclusively)", so the maximum possible for the Intel HD Graphics Integrated Graphics Processor is one GB while you say that 4GB are used.

You may have increased it, which you might have done in two ways:

  • In the BIOS menu, look for a menu name similar to Graphics Settings, Video Settings or VGA Share Memory Size, typically found under the Advanced menu. Change the amount, save BIOS setting and reboot.

  • In the registry, key HKEY_LOCAL_MACHINE\Software\Intel\GMM, value of the DWORD item DedicatedSegmentSize is interpreted as number of MB to use.

Check both and see if one of the specifications is too large.

harrymc

Posted 2019-03-10T16:09:08.780

Reputation: 306 093

Having the same issue: https://superuser.com/q/1496663/123710 but could not find the registry key: HKLM\Software\Intel\GMM

– hjpotter92 – 2019-12-09T04:34:58.070

Asked: 2019-03-10T16:09:08.780

Viewed: 1 563 times

Active: 2019-03-10T16:47:28.143