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Jon4L
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Ryzen (mobile) APUs (VEGA_CU)

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Just to make things clear regarding (mobile) Ryzen (vega) APUs frame buffer/ VRAM.

 

I saw a lot of people complaining in the HP forums about not being able to adjust their frame buffer/ VRAM in the UEFI (BIOS). Most of them seemed to be concerned about their fixed frame buffer/ VRAM size not being enough for games or heavy workloads. 

In addition most of the answers from the support didn't clarify customers concerns either...

 

Unlike common GPUs Ryzen APUs use a part of your RAM as their "video memory" / frame buffer. 

That's exactly the biggest diffrence and common misconception to think that the frame buffer/ VRAM set in the UEFI (BIOS) is you actual maximum your APU can use. 

In contrast to dedicated GPUs where your frame buffer/ VRAM is physically limited, AMD Ryzen APUs have a dynamic frame buffer/ VRAM. Therefore they can use way more than the actual frame buffer/ VRAM set in your UEFI (BIOS). 

 

To sum up you don't have to worry that the frame buffer/ VRAM set in the UEFI (BIOS) limits your APU Vega CU performance cause your APU will automatically increase its actual VRAM/ RAM usage beyond the set limit in the UEFI (BIOS).

Without the OS/ monitoring software recording more than the set limit in the UEFI (BIOS). You can think more of it like a small frame buffer part of your actual RAM always "reserved" as a buffer. 

 

If you want to know more about this in detail, I would suggest reading this microsoft article or watching one of the yt videos. 

https://docs.microsoft.com/en-us/windows-hardware/drivers/display/using-memory-segments-to-describe-...

https://youtu.be/Y2KPzMeQnWE

https://youtu.be/YDmYHpykcDo

 

Tl;dr: Please don't delete this thread 😜

 

Best regards, 

Jon

 

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