How To Fix SMT Disabled in the BIOS of the ASUS TUF GAMING X870-PLUS WIFI motherboard.

[Marc_S_F]

If your AMD Ryzen 5 9600X isn't showing its full 12 logical cores, check your motherboard's BIOS settings. The issue might be due to Gaming Mode, which disables Simultaneous Multi-Threading (SMT) by default.


Solution:

1. Enter BIOS – Restart your PC and press Del/F2 to access the BIOS.
2. Locate Gaming Mode – Navigate to Advanced Settings > CPU Configuration.
3. Disable Gaming Mode – Set Gaming Mode to OFF (it may be enabled by default).
4. Save & Exit – Apply the changes and restart your PC.
5. Verify Core Count – Open Task Manager (Ctrl + Shift + Esc), go to Performance > CPU, and confirm that all 12 logical cores are enabled.

Why This Works:


The Gaming Mode sets limits CPU behavior to prioritize specific tasks, which can cause SMT to be disabled. Turning it off ensures that your CPU operates at full capability.