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I have a setup with 5600G on a Gigabyte motherboard (b550m ds3h ac, Windows 10) and recently attached a discrete card.

When I play some goes it is laggy sometimes and later when I checked the task manager i have seen that the shared gpu memory still is in use.

For this particular game which in total requires around 2GB of video memory, but 1GB is being utilised from system memory as shared GPU.

I have 16GB of system memory and half of it can be utilised as shared GPU memory based on my motherboard config I believe. Using shared GPU making my system under memory pressure and discrete GPU as almost useless.

How can I disable shared GPU memory?

Despite all the things I tried below the shared GPU is still being used.

  1. Ensured display connected directly to card.
  2. Verified in device manager under display adaptors, only discrete driver showing.
  3. Changing graphic option for game executable under graphic settings.
  4. Disabled integrated graphics in BIOS.
  5. Changed “Initial display output” to PCIe slot in BIOS.
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  • @Ramhound It's true as i can see 8GB of shared gpu and 16GB of total video memory in task manager. If i have 32GB of memory i will have 16Gb of shared memory(capped at 16). This works based on my mobo. But at least I am lucky it works on demand rather than reserving the whole 50% of memory which i saw before in some laptops.
    – goodfella
    Commented Sep 5 at 4:44

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