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Excessive reserved RAM hardware

Hugo6oooooo -  
flo88 Posted messages 28659 Registration date   Status Contributeur Last intervention   -

Hello,

I have a new Lenovo laptop. I have 16 GB of RAM, of which more than 2 GB is "hardware reserved." I believe it's being used by the integrated AMD graphics card, as the values match.

The only problem is that I also have an Nvidia graphics card in my PC with 6 GB of dedicated memory, so I really have no need for the dedicated memory of the integrated GPU (?), while I could really use that extra 2 GB of RAM...

In the BIOS, I have the UMA frame buffer size option, ranging from 512 MB to 2 GB, is that the one to change?

Above that, I have a "graphics device" option currently set to "Switchable graphics," with another option "UMA graphics," should I change it?

If I lower the UMA frame buffer to 512 MB, does that present any stability risks considering the presence of the other graphics card?


What should I do?

Thank you very much for your responses


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Réponse 1 / 2
brucine Posted messages 24397 Registration date   Status Membre Last intervention   4 098
 

Hello,

Just because there is a dedicated graphics card doesn’t mean that the integrated graphics chipset is never used.

The memory you mentioned is of course not added to the 16 GB but included.

If Windows is running normally, I wouldn't touch it, otherwise it's up to you:

https://www.malekal.com/memoire-materielle-reservee-windows-10/
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brucine Posted messages 24397 Registration date   Status Membre Last intervention   4 098
 

I don't know if Windows doesn't deliberately set it to high values to ensure the functioning of the BIOS and system hardware when needed and according to their specific needs for that particular PC.

Remember that reckless tinkering with msconfig often leads to unexpected crashes.

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Réponse 2 / 2
flo88 Posted messages 28659 Registration date   Status Contributeur Last intervention   Ambassadeur 5 158
 

Hello

The UMA frame buffer size is a memory buffer for the processor; it seems obvious that it shouldn't be altered, lowering it will slow down the processor in its calculations.

The memory dedicated to the AMD GPU is necessary; on a laptop, the display will automatically switch between the AMD chipset and the Nvidia card; for example, on battery, the Nvidia card is automatically disabled, otherwise the battery wouldn't last 20 minutes. The memory used will also not be 2GB constantly, it is adjusted automatically.

All of this should have been explained by the seller; in any case, it's explained in the manual... in principle.

Therefore, nothing should be modified; in fact, it is very rare that the RAM dedicated to the GPU is configurable manually.

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