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# homelab engineering notes — benchmarks, tuning, automation
# 2026-07-15Mapping every tuning knob on a Ryzen 9 7900X — from a running system
Thermal limit, power budget, curve optimizer, and boost ceiling are all adjustable at runtime on Linux via the SMU mailbox — no BIOS trips. Five experiments and 178 benchmark runs later, one knob dominates, one is a free lunch, and one turns out to be decorative. Includes an 81-run full factorial and the measured efficiency frontier.
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