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Afterglow (GPU tuning)

Afterglow is an MIT-licensed tuning utility for NVIDIA RTX GPUs: core and memory overclocking with driver-validated ranges, clock-lock undervolting including a measured voltage/frequency curve on RTX 50 (where NVIDIA blocks the curve APIs), per-fan curves with hysteresis and...

Dashboard: live RTX 5090 telemetry during the built-in burn test

Cost / License

  • Free
  • Open Source (MIT)

Platforms

  • Windows
Measured V/F curve of an RTX 5090 with pick-point undervolting
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What is Afterglow (GPU tuning)?

Afterglow is an MIT-licensed tuning utility for NVIDIA RTX GPUs: core and memory overclocking with driver-validated ranges, clock-lock undervolting including a measured voltage/frequency curve on RTX 50 (where NVIDIA blocks the curve APIs), per-fan curves with hysteresis and zero-RPM, monitoring including memory-junction temperature, FPS and frametime metrics via ETW present tracing with no RivaTuner needed, a burn test with bit-exact error detection, a guided stability stepper, per-game auto profiles, a scriptable CLI, and an MCP server so AI agents can tune autonomously.

All hardware access goes through NVIDIA's own userland driver interfaces — no kernel driver, no injection, no telemetry, no account.