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
Trivial to apply, no measurable effect on modern Windows. The classic 'looks technical, does nothing' tweak.
How Compy treats it
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 Compy Blackbook holds 174 graded entries like this one, judged against your hardware — and every change it does make is reversible, with the receipt to prove it.
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