This is an Insyde H2O BIOS and I want to change the UMA buffer size from this BIOS. I could be able to identify that this means changing the VRAM of Vega 8 which is what I want exactly, and I found variables with the part I extracted from UEFI Editor. I'm new to BIOS editing so I need help right now.

I can't put the MEGA link I uploaded the files I extracted because it says I'm not allowed to put links as a new member, but they are nothing special anyways just IFR extractor dump of the section from UEFI editor which has "UMA buffer size" text.

So right now I found the variable hex which is 05 9A 0E 02 0F 02 93 00 00 50 D4 00 10 12 40 00 00 00 FF FF FF FF 00 00 00 00 and I also found the part I want to change. However I don't know what to swap between this 512MB option's hex and Auto option's hex. I searched some posts with hex editing and one of them was just swapping a "30". I looked at the other parts here and their auto identifier has to be "10". However this one does not have a 10, it has a 02 and 12 which makes me think that 12 is the value here, but also there's 0x8F and 0x2 check which will probably block my change. I can just swap the first 3 hex blocks and the last 3 blocks with auto but I need to ask if it's that first. As I said, I'm a beginner at this field.