Windows Shared GPU memory

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FPS

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Refer picture from Task Manager (W10/AMD).
Installed RAM = 32 gb
GPU VRAM = 12 gb
Shared GPU Memory = 16 gb (out of Installed RAM of 32 gb)
Total GPU Memory = 28 gb
Leftover RAM memory for system = 32 - 16 = 16 gb only ?

Will the system get back this shared memory of 16 gb for tasks which are not GPU intensive as and when needed ?
If not the system is as good as a system with 16 gb RAM even with installed 32 gb. This shared memory will be a waste sitting pretty doing nothing most of the time.

Is it advisable to decrease Shared GPU Memory and how ?
 

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Its all dynamically allocated.
GPU can use up to 50% of RAM to cache. If the system needs it, it will take it back. Besides if the GPU is actually swapping to RAM (when VRAM is full) your game is a stuttery mess anyway-the extra latency tanks your fps

32 out of my 64 gigs is shared with GPU
I've not noticed any ill effects when my game's usage goes above 32

Reserved video memory is more important when using iGPU which doesn't have any onboard memory. I think this is controlled via BIOS
 
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