AMD igpu stuck at 4mb VRAM

AMD igpu stuck at 4mb VRAM

Hardware:
CPU: AMD A8-7680
GPU: Radeon R7 Graphics (IGPU) 2048MB
RAM: 16GB DDR3 @ 1600MHz
Motherboard: EMX-A70FM2+iCafe
Audio Codec: ALC662
Ethernet Card: Realtek
Wifi/BT Card: None
Touchpad and touch display devices: None
BIOS revision: Not Sure

I was able to successfully install a fully working hackintosh Big Sur, everything works great but my problem is that the visuals are very laggy due to the VRAM being capped at 4mb even though it could go up to 2048MB (2GB) I also feel like there aren't any hardware acceleration present. Audio also doesn't work but my main concern is about the VRAM being stuck at 4mb, using a different monitor that has 1920x1080 resolution bumps up the VRAM but it only goes up to 7mb.

Originally I was using MacPro7,1 in SMBIOS but I later realized that it was noted on Dortania OpenCore Install Guide that in order for the igpu to work properly I should use MacPro6,1 which is what I am currently using right now but still it is stuck at 4mb VRAM.

https://preview.redd.it/pxj98lhxwa4d1.png?width=573&format=png&auto=webp&s=4b91cb436ed5f4be74e098b5b45d7b8f033b0be8

Here is the Graphics Hardware Overview in System Information. I can confirm that the Device ID, Vendor ID, and Revision ID is correct based on Windows Device Manager.

https://preview.redd.it/gv9fjkxbxa4d1.png?width=511&format=png&auto=webp&s=9a41bb1b261e4475e75d6671c4680f93957e3ce9

Here is my DeviceProperties in config.plist

https://preview.redd.it/2h7qan2dxa4d1.png?width=711&format=png&auto=webp&s=10e0384c67b5e5278ded9f4e6c80436ba8814fb2

submitted by /u/nubnoob69
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