SkillFishOS Tuner

SkillFishOS Tuner

skillfish-tuner — the control centre for the AMD BC-250, with no terminal required. A native PyQt6 app, bilingual IT/EN. The GUI talks to a single privileged daemon (skillfish-tuner-helper) over one pkexec authentication at launch.

What it controls

• CPU — max frequency, undervolt offset, temperature cap. Suggest UV proposes a starting offset; Test (benchmark) applies, stresses and rolls back if unstable.
• GPU — max frequency (capped at the validated-stable 2200 MHz), max voltage, and a Governor mode toggle:
  • Balanced (default) — clocks up only as needed.
  • Performance — holds the top safe-point under any gaming load (best FPS in GPU-bound games), idles to 350 MHz. See GPU Governor and Tuning.
• Fan — manual % or automatic curve, with a Test that spins it up for a few seconds.
• VRAM (UMA) — resize the GPU's reserved RAM (writes the BIOS CMOS, needs a reboot). See Memory VRAM and GTT.
• Compute Units — a live grid (green/red), 24/32/40 presets, no reboot, plus a CU health test. See Compute Units (40-CU).

Presets

Four ready CPU+GPU+fan presets: Stock · Performance · Turbo · Crazy. The ISO ships Stock; opt into more when you want.

Safety features

• Benchmark-and-rollback testing: a setting is applied, stressed with vkpeak, and reverted automatically if it isn't stable.
• A pop-up live monitor (temperature / frequency / voltage / fan charts) runs during any test.
• The GPU governor is written with a smooth multi-point voltage curve and reloaded gently (stop → settle → start) — see the GPU Governor and Tuning page for why that matters (it prevents hard-freezes).

How it talks to the hardware

Privileged actions (SMU OC, governor config, fan, CMOS, CU routing) go through skillfish-tuner-helper, a root daemon started once via pkexec that reads JSON commands on stdin and replies on stdout — so you authenticate once per session, not per action.

See also: CPU Overclock and Undervolt · GPU Governor and Tuning · Compute Units (40-CU) · Benchmarks