Throttling on laptops limits performance to manage heat and battery life.
Throttling on laptops limits performance to manage heat and battery life.
You're experiencing thermal throttling on your Legion Pro 7 16IRX8H. After reviewing forums and YouTube tutorials, it seems the issue is likely due to overheating. You've already tried undervolting with ThrottleStop, but it doesn't resolve the problem. Consider checking your cooling setup and ensuring proper airflow. If needed, you can share screenshots from ThrottleStop to Lenovo Vantage for further diagnosis.
If you have the warranty, overheating should qualify as a valid claim. With the warranty active, you might reach out to the reseller (if they're trustworthy) and inquire about repair options.
Share ThrottleStop images showing the main window, FIVR and TPL interfaces. Verify the Log File option on the main screen. Run a game for at least 15 minutes. After testing, close the game and exit ThrottleStop to complete logging. Save the resulting log file together with your screenshots for your next update.
I didn't keep the game open for too long, but if you believe the logs aren't sufficient, I'll rerun it. 2025-01-27.txt
Your laptop is experiencing serious overheating concerns. Have you ever taken it apart to clear out the debris? Think about swapping in Honeywell PTM 7950 paste. Stick to this product—other pastes often fail over time when applied directly to mobile CPUs. PTM 7950 has been successfully used in laptops. The temperature records indicate that at 80W, the core temperature gradually rises to 100°C, after which throttling starts. While some throttling is normal, BD PROCHOT can kick in quickly once it begins. This sensor-based throttling may randomly lower your CPU speed to just 400 MHz, causing significant drops in frame rates. These episodes can last longer as temperatures climb. Many systems now disable BD PROCHOT automatically, making it hard to use ThrottleStop. I own a MSI Vector model with a similar 14900HX; its BIOS lets you manage BD PROCHOT directly. I’m not sure about your Lenovo model, but it might be hidden in the BIOS settings or require a BIOS tweak. I haven’t seen any success stories for Lenovo BD PROCHOT. This kind of throttling can worsen over time. A machine that drops from 4400 MHz or 4500 MHz to 400 MHz feels extremely poor for gaming. If you switch back to PTM 7950, your temperatures might stabilize and the throttling could disappear. Manufacturers rarely share details about which sensors trigger this issue. It’s disheartening to see high-performance laptops lose power due to this problem. Look at the mV Boost display in ThrottleStop FIVR and set it to 150. This should help you safely lower the CPU voltage and cache voltages, easing the cooling burden. Every small adjustment makes a difference when cooling is an issue. Most 13900HX models need between 175W and 200W to reach full performance. Overheating at just 80W is a major concern for your system.
Thanks for your message... I've faced several issues with this laptop. Initially, the fan on the cooler failed, which required replacement. Later, I encountered persistent GPUID 100 errors and had to replace the entire motherboard. Now, it's still under warranty. Perhaps I can request a replacement part or a full refund. I'll also test the mV Boost feature to see what happens. Thank you!
The thermal paste might still be missing after your laptop underwent repairs. Some technicians overlook the need for perfection when cooling a 13900HX. Its cooling efficiency appears significantly lower than other Lenovo Legion models I’ve heard about. The heatsinks and fans Lenovo employs for this model are generally of high quality. Something seems amiss. A modest adjustment in undervolting won’t fix the problem. Watch some YouTube tutorials to master proper thermal paste application. Many viewers are disappointed by the previous paste job.