The HP Pavilion 15 laptop shows odd behavior—slowdowns or crashes—specifically when it’s plugged in and charging.
The HP Pavilion 15 laptop shows odd behavior—slowdowns or crashes—specifically when it’s plugged in and charging.
@SolarPwr303 Your images appear clear. It seems HP has left several key configurations accessible. I advise against updating the BIOS, as newer versions often restrict features. To address EDP throttling, launch the TPL window and adjust Power Limit 4 to zero. Then, in the FIVR window, verify the Unlock Adjustable Voltage settings for both CPU core and cache. Move the IccMax slider fully to the right, setting it to its maximum value of 255.75. Execute another log file and inspect the far right column for EDP throttling reports. Some devices conceal power and current caps that can't be changed. These steps should help improve stability. Most users with the 8550U prefer undervolting—lower voltage reduces power use and limits throttling, lowering temps. In the FIVR window, adjust the CPU Core and Cache Offset voltage to -49.8 mV, then press Apply. Confirm the values appear in the Offset column of the top-right monitoring table. This area is typically ideal for testing. Certain 8550U models perform well at -70 mV or slightly higher. If you encounter a blue screen during testing or gaming, it indicates excessive throttling—your CPU requires more voltage. After thorough trials and confirmation of stability, select the OK Save voltages option at the bottom right of the FIVR window. This safeguards your settings. In the TPL window, ensure the MMIO Lock box is checked; Intel CPUs don’t need separate turbo limits. This setting handles MMIO power needs automatically. For MSR turbo limits, clear the Disable Power Limit Control box. Raise PL1 from 15 to 25. Also, modify the Speed Shift setting within TPL. After applying these changes, run another log file so I can review your progress. Intel’s thermal threshold is set at 100°C, while HP has reduced it slightly to 97°C. These adjustments may generate extra heat, but it’s safe. Your CPU will naturally slow down to prevent overheating. The lowered throttling temp enhances protection. Intel’s thermal management functions effectively when needed. I recommend using ThrottleStop 9.4.6 for optimal results. The FIVR interface design aligns well with other interfaces. Overall, there are minor enhancements to implement.
Are you referring to the Power Limit 4? I can only adjust the top box on the right.
Executed the tests using your specified parameters. No noticeable gains observed. Please review the results: 2022-05-15.txt
That's frustrating. The HP lockdowns are really annoying. My laptop has crashed twice recently—once on Sunday and once on Monday. I wasn't sure if the test was running the first time, but it didn't because I got distracted. I'll run the second test soon (using -49.8 offset voltage).
HP's EDP throttling at low power usage is a misleading claim. The same 8550U ran at full load on a Lenovo C930, drawing over 38W despite its 15W TDP rating. Lenovo didn’t restrict power limits, so performance dropped only when overheating set in. For future laptop purchases, conduct proper testing to avoid devices that underperform under stress.
This laptop seems a bit tricky to test. I think they wouldn’t want me using it for different programs, but I still have another machine. My main concern is why it keeps crashing or locking up and turning black when idle, especially with the screen off.