MMCSS SystemResponsiveness=0 / GPU Priority 8
Also searched as: mmcss · systemresponsiveness · gpu priority registry
What it does
Registry edits to multimedia scheduler weighting.
The honest verdict
Graded placebo. Trivial to apply, no measurable effect on modern Windows. The classic 'looks technical, does nothing' tweak.
Compy won't recommend it. If you're curious anyway: change one thing at a time, measure it on your own rig, and revert unless it's clearly better — that loop is exactly what Compy is built around.
The full graded entry
This entry ships inside the app, cross-linked to every related verdict in the graded book. The Blackbook publishes its verdicts here — the full write-ups stay in the book, on your rig, next to your own measurements.
The Compy Blackbook holds 191 graded entries like this one, judged against your hardware — and every change it does make is reversible, with the receipt to prove it.
See Compy →