Is it really possible to change default VRAM of GPU?

I have a laptop with 1 GB VRAM GPU (4,5 GB Total) with an AMD Radeon HD 7610M GPU.

Can the amount of default VRAM on a GPU be changed if there is no option for that in BIOS/Firmware settings?

I have watched many videos but none of 'em did help me to make GTA 5 have more accessible memory.

If there is no option in BIOS on a laptop to change VRAM, can I do it in some other way?

A Registry patch fix exists for Intel GPUs, but not for AMD.

I have not tried it (probably because Frogger is too high tech for me) but you can find it at https://www.thewindowsclub.com/increase-dedicated-video-ram-windows-10 which states in part:

You are not increasing the value for real, but you scale up the amount of VRAM to a value to serve as a substitute for the memory requirements to start the game or an application.

I'd suggest testing performance in-game before and after to make sure this change is beneficial.

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Follow the below steps to reallocate RAM as VRAM for integrated Intel graphics cards.

Open Run and type regedit then navigate to the following path:

HKEY_LOCAL_MACHINE\Software\Intel

Right-click on the Intel folder. Choose New and click on Key. Name the key as GMM.

Select the new GMM folder on the left sidebar.

Right click on the right side of the Window and click on New from the drop-down menu.

Increase dedicated Video RAM in Windows 10

Choose the Dword (32-bit) and name it as DedicatedSegmentSize .

Double click on the DedicatedSegmentSize and click on the radio button with option Decimal to set the base to Decimal.

Enter the number of megabytes of RAM you want to allocate as VRAM in value data. Make sure you type a number within the range from 0 to 512.

Save to apply the changes.

Restart the system.