His earlier 15-cap sweep (260-400W, 16832066) is superseded by a
38-cap sweep at 10W resolution from 230-600W (16854218) — strictly
richer envelope. Two findings worth surfacing:
- Firmware boost-clock plateau at SM 2610 MHz: caps 400-600W produce
identical 51.96 TPS at 393W actual draw. Auto-plateau detector in
power-cap-sweep.sh caught both sub-plateaus cleanly (400-470W and
480-600W).
- decode-concurrent N=4 plateau lower than decode-single (46 vs 52
TPS) — on a 4090 + 27B Q3_K_XL the GPU is under-load at c=4 even
at full TDP, so single-stream wins. Useful cross-rig signal.
HARDWARE.md table + chart caption updated; chart regenerated with
both load-mode curves overlaid + plateau zone shaded.
Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
