Disabling TSX
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Recommendation
Leave as defaultLeave the default state.
Before changing TSX for a game, you need to confirm that the program uses these instructions and that the result of the change is reproducible.
- Scope
- Intel TSX transactional instructions
- FPS and memory
- FPS is not affected
What changes
Section titled “What changes”TSX (Transactional Synchronization Extensions) is an Intel extension for hardware transactions: a program executes a critical section as an all-or-nothing transaction and rolls it back on a conflict, instead of using traditional locks. This can reduce synchronization overhead in multithreaded code. Support depends on the processor generation, microcode and the application itself.
The tweak controls the use of TSX on the Windows side and requires a reboot.
Exceptions and differences
Section titled “Exceptions and differences”Why the tick is under “Legacy”: Intel disabled the TSX instructions with microcode updates on vulnerable processor generations after vulnerabilities related to transactions were discovered. On most modern systems the instructions are unavailable, and the tick changes nothing. According to the visible BoosterX description, disabling reduces the attack surface and eliminates rare crashes of old games on certain old CPU generations.
On an unsupported processor the setting is not applied. The change affects security, so without a confirmed need, leave the default state.
How to verify the result
Section titled “How to verify the result”Compare the default and modified states across several identical runs of the same workload and make sure that reverting restores the previous behavior.
How to change and revert
Section titled “How to change and revert”In BoosterX, open “Optimization” → “Legacy” → “TSX”, move the toggle to the “On” position to leave the default state (the “Off” position applies the change), and click “Apply”. If “Instant apply” is enabled, a separate click is not required. Perform a reboot.
Confirmation
Section titled “Confirmation”The public Intel page about the microcode disabling of TSX does not open as of the verification date, so the fact is stated cautiously and remains without a direct link. The visible BoosterX descriptions and the reboot requirement are confirmed.
Last check: 2026-09-20.