Interrupt Routing Lock
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Leave as defaultLeave the default state.
Apply the lock only with a pre-planned interrupt distribution and compare ISR/DPC before and after the change on your own hardware.
- Availability
- Windows 11, PRO feature
- FPS and memory
- See the research
What changes
Section titled “What changes”By default, Windows periodically redistributes device interrupts between processor cores, balancing the load. This setting enables a lock on that redistribution: the current interrupt distribution is fixed. The setting itself does not define affinity — IRQ and interrupt affinities of specific devices are configured separately.
The tweak is available only on Windows 11 and is part of BoosterX’s paid (PRO) features.
Exceptions and differences
Section titled “Exceptions and differences”A reboot is required after enabling. “Instant apply” does not extend to the interrupts page — use the “Apply” button (according to the app’s visible rules). If DPC grows, a device disappears or instability occurs, immediately revert to the default state. The lock does not guarantee reduced latency on any hardware.
How to verify the result
Section titled “How to verify the result”Compare the ISR/DPC distribution and device stability before and after the change on the same hardware (the methodology is in the research below). A qualitative criterion: after enabling the lock, the interrupt distribution across cores remains the same between reboots.
How to change and revert
Section titled “How to change and revert”In BoosterX, open “Optimization” → “Interrupts” → “Interrupt Routing Lock”, toggle the switch and click “Apply”. Perform a reboot. To revert, disable the lock and reboot again.
Confirmation
Section titled “Confirmation”- Research on DPC and kernel workers — methodology for observing ISR/DPC.
- Microsoft: Interrupt affinity and priority — interrupt affinity and priority.
Last checked: 2026-09-20.