this post was submitted on 25 Feb 2025
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[–] [email protected] 19 points 2 days ago* (last edited 2 days ago) (3 children)

Question about how shared VRAM works

So I need to specify in the BIOS the split, and then it's dedicated at runtime, or can I allocate VRAM dynamically as needed by workload?

On macos you don't really have to think about this, so wondering how this compares.

[–] [email protected] 6 points 1 day ago

It's typically dynamic

[–] [email protected] 5 points 1 day ago

On my 7800, it’s static. The 2GB I allocate is not usable for the CPU, and compute apps don’t like it “overflowing” past that.

This is on Linux, on a desktop, ASRock mobo. YMMV.

[–] priapus 3 points 1 day ago

It will most likely be dynamic, with the option to statically set it.