How to Fix DPC Latency Spikes in Windows 11: Eliminate Audio Cracks & Micro-Stutters

The Architecture of Windows Driver Interrupts

When external hardware (like your network card, SSD controller, or GPU) finishes a task, it sends a hardware interrupt request (IRQ) to the CPU. The operating system handles the immediate interrupt and schedules a Deferred Procedure Call (DPC) to complete the heavier data processing.

If a poorly coded driver, conflicting background service, or energy-saving power state takes too long to execute its DPC routine, it blocks other threads on that CPU core. In competitive games running at 240+ FPS, a single 2-millisecond driver delay causes an immediate frametime spike—felt as an infuriating micro-freeze or missed hit-registration moment.

The Primary DPC Offenders & Fixes

Step-by-Step LatencyMon Diagnostic Workflow

1. Download and Run LatencyMon: Launch LatencyMon with administrator privileges, click the green Play button, and play your target game for 10 minutes.
2. Inspect the Drivers Tab: Sort by Highest execution (ms). Any driver that exceeds 1.0 ms is actively generating frametime micro-stutters.
3. Configure MSI (Message Signaled Interrupts): Use the MSI Utility tool to set your GPU and network adapter to MSI mode with a High interrupt priority, decoupling legacy shared IRQ lines.
4. Enable Ultimate Performance Plan: Prevent CPU cores from parking or idling down below base frequencies during match play.

After stabilizing your system frame pacing, test your physical aim consistency with the DCPROSENS Mouse Calibration Suite.