Unique processor performance and energy consumption during testing
Unique processor performance and energy consumption during testing
Observed some unusual patterns with my laptop CPU after a fresh Windows setup. Benchmarks keep showing unstable usage and power draw stays between 12 and 17 watts despite a 15-watt limit. Intel XTU reports power throttling far below the target. No overheating was recorded—temperatures stayed under 75°C. Reducing the power cap doesn’t fix the issue; it just causes erratic spikes and drops. Before the clean install, performance was consistent at 100% with stable 15W usage. Afterward, logging speed in Intel XTU adds to the chaos: briefly dropping to 10W, then jumping to 20W for a split second before settling back to 15W for a few seconds, then falling again to 10W. hwinfo confirms these DTP fluctuations only occur when the laptop is connected. When unplugged, everything runs smoothly.
Boosting logging rate in Intel xtU makes performance even more unpredictable. The processor briefly hits just 10 watts, then jumps to 20 watts for a fraction of a second before settling at 15 watts for a short time, only to drop back down to 10 watts again. hwinfo confirms these power changes are happening.
This feature activates only when the laptop is connected to a power source. If it's not plugged in, everything functions smoothly and reliably.
Consider trying ThrottleStop. Look at the MMIO Lock section in the TPL window. It seems the turbo power limits are changing unpredictably, which might resolve the issue. Some systems have an integrated controller that adjusts these limits automatically when connected. ThrottleStop won't address this specific concern. The Task Manager charts display Utilization, not CPU usage directly. Access the Limit Reasons window in ThrottleStop to identify various throttling events—red lights may indicate thermal or voltage regulator issues. Enable the ThrottleStop Log File option to keep a record of CPU performance and throttling causes. Include this log in your next report.