I have a Ryzen 5 Pro 4650G, on a system with Gigabyte a520M motherboard with 16GB or DDR4 RAM
(IN BIOS) i have set the RAM for XMP Profile 1, 3200mhz and i set the iGPU, using the AMU menu
i change it from Auto to AMU_Specific and set it to 2Gb
but after i save the settings, everything is saved but the iGPU will always turns back to Auto
and in Windows it will always shows 512MB of Vega 7
is this a feature, a bug, and is there a way to make the iGPU to 2Gb?
Honestly I think that would be a motherboard issue. I would ask Gigabyte support about that. You might check if they already have a newer bios available for your board and load that first if so.
as mentioned its a Gigabyte BIOS issue!
Gigabyte had bad BIOS since X370 (i dont know why)
The video memory of this processor is able to use a maximum of 2 gigabytes. If you set 4 gigabytes in the BIOS, the default memory will be reset to 512 megabytes. Set the vram to 2 gigabytes and everything will be fine.
A future project of mine is getting the X300W barebones mini-PC (literally fits in your hands it's that small) from ASRock and slapping a 4750G or better into it. It's a ultimate tiny little destroyer of a system, only costs about $1000 US too to fully build .