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Modify bios frame buffer size to 2 Gb on Lenovo ThinkCentre M715q 2nd Gen
#1
Hello. Is it possible to modify the bios on the Lenovo ThinkCentre M715q 2nd Gen nettop to 2Gb?
The maximum amount of allocated video memory is 512 MB, if you set it automatically, it is allocated 1 gb.
I tried changing the parameters in AMIBCP-5-02 in the UMA Frame Buffer Size section from auto to 2G, but there was no result.
Then one person on one of the forums suggested that from Boot_Shell_AmiSetupWriter line enter the command UEFI amisetupwriter 0x50 0x40 or amisetupwriter 0x50 0x00, then amisetupwriter 0x176 0x40. but the same result was no. Most likely, this limit is written in the code, and it must be sought by digging through half of the firmware
Below I attach the BIOS dump, merged by programmer

https://www.mediafire.com/file/e8yhsda64...8.BIN/file
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quote
#2
@max911
First try this method to set 2g on UMA Frame Buffer Size ,then respond to the result.( It's change variables under Grub shell like you used AmiSetupWriter.)

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quote
#3
No change(
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#4
@max911
1. It shouldn't be ,are you sure the command line you typed is correct ? if so ,in addition to original one command then also type this command : setup_var AmdSetup 0xDD 0x1 then test again.

2. If plan 1 is still get a failure ,now try plan 2. This is a mod of unlock advanced menus based on you provided dump. There are two "UMA Frame Buffer Size" options on setup module. One is Lenovo custom under Devices >> Video Setup ,another one is a hidden AMI setting under Chipset >> GFX Configuration. This mod can let you see another "UMA Frame Buffer Size" option in bios ,then you could directly tune it in bios without through variable change under uefi.

I have to sleep ,it's too late now(A.M 1:22) ,go luck!


*.setup module = what you can see the menus structures on AMIBCP. On plan1 i try to let you to change "UMA Frame Buffer Size" size under AMD CBS ,this is a external module ,insert it to bios screen is difficult and i can't guarantee if i can perform it. So i let you use Grub.

My page>>>click
My bios unlock >>> click
donate me >>>click


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quote
#5
Plan one didn't work
Plan two worked!) Thank you so much! You are a true pro!
I installed 3 gb of video memory and everything works correctly.
I wanted to overclock the RAM a bit more, set the frequency to 1600 mhz, but no change. Maybe some other settings should be changed? The performance of Vega 11 depends very much on the memory frequency. I currently have 2 2666 mhz memory cards and I wanted to overclock them to 3200 mhz so I don't have to buy new ones.
https://www.mediafire.com/file/cktc7rjfq...t.pdf/file
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quote
#6
1. I'm glad to hear that the result is great.

2. In fact ,the plan 1 is the same operation with what you did in plan 2 , setup_var AmdSetup 0xDD 0x1= set UMA Mode to UMA_SPECIFIED ,then setup_var AmdSetup 0xE0 0x400 = set UMA Frame buffer Size to 2g ,maybe also need to set Integrated Graphics Controller to Forces instead of Auto.

3. What's south bridge of this machine?? If it support overclocking ,you can attempt overclocking via Ryzen Master utility.

My page>>>click
My bios unlock >>> click
donate me >>>click


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quote
#7
https://www.mediafire.com/view/otdtvil6f...9.jpg/file
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#8
@max911

I mentioned the chipset that support overclocking is mean such as :x470,b450,x570..etc ,but i'm can't sure your south bridge. You could try Ryzen Master yourself.

My page>>>click
My bios unlock >>> click
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