Steers the GPU's interrupts/DPCs onto the two highest-numbered logical CPUs and off core 0, where Windows funnels most system interrupts. It writes an Interrupt Affinity Policy (DevicePolicy = 4 'specified processors' + an AssignmentSetOverride bitmask, computed at runtime from your CPU's logical-processor count) under the display device's PnP instance. On busy systems this reduces contention between GPU DPCs and OS/timer interrupts, tightening frametimes. EXPERT: pairs best with GPU MSI mode; a poor core choice can hurt rather than help, so benchmark frametimes (PresentMon/CapFrameX) before keeping. Needs 2+ logical CPUs. Reboot required. Reversible — revert removes the DevicePolicy/AssignmentSetOverride values (restoring default 'all processors').
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows-hardware/drivers/kernel/interrupt-affinity-and-priority