Smart Access Memory / Resizable Bar not working on B550 boards
I'm trying to get SAM / Resizable Bar to work, but it tanks the CPU performance when it's ON.
On Windows, it's working perfectly.
I saw on a Reddit post that turning off Resizable Bar and leaving Above 4G decoding on BIOS fixes this issue, but it didn't work for me. https://www.reddit.com/r/linux_gaming/comments/v58ts5/quick_heads_up_about_something_i_discovered
I tried on 3 different boards:
- Asus B550-A ROG Strix
- Asus B550m Gaming Plus
- MSI B550 MAG Tomahawk
System Information:
- OS: Manjaro Linux (also tried on Nobara, Ubuntu, openSUSE...)
- Kernel 6.1.1-1 (also tried Linux-Zen and XanMod)
- Mesa 23.0.0-devel (also tried the stable version)
- Desktop Enviroment: KDE (also tried on Gnome and XFCE)
PC Specs:
- CPU: Ryzen 5 5600X
- GPU: Radeon RX 6800XT
- Mobo: MSI B550 MAG Tomahawk
- RAM: G.Skill TridentZ 16GB 3200GHz
- Storage: Samsung NVMe 970 EVO 500GB
Screenshots for comparisson: