Can I raise the maximum CPU power setting on a Lenovo Legion laptop?
Can I raise the maximum CPU power setting on a Lenovo Legion laptop?
I am building a tailored water cooling system for my laptop and also exploring additional upgrades such as a shunt mod for the GPU. I ran cbr23 multicore and achieved only 25700, while some laptops with i9 14900hx reach up to 33000. On the 16IRX9 models, the TDP is capped at just 105 watts, whereas others hit around 165 watts. Can I modify the BIOS (perhaps using the Pro 7i model which allows higher power limits)? In the BIOS there’s no option to adjust the TDP—it only displays the power limit without any change capability.
Welcome to the forums, newcomer! I’m building a custom water cooling system for my laptop and also exploring other options such as a shunt mod on the GPU. In my opinion, what you’re doing seems counterintuitive for a laptop. While some laptops can reach up to 33000 on an i9 14900hx, people on this platform usually upgrade the thermal paste and pads for better performance, then lower the voltage on CPU and GPU. Is it feasible to modify the BIOS (perhaps using the Pro 7i model which supports higher power limits)? In the BIOS there’s no option to adjust the TDP—it only displays the power limit without any change capability. You risk damaging your laptop and ending up with a costly repair.
Have you thought about using two devices? A desktop and a laptop could streamline things, though it wouldn't cost anything.
I'm a student without funds for another desktop since I already own an i9 14900hx and an RTX 4070 laptop (which cost me $2300 in India). It's also enjoyable to work on projects and tackle challenges independently.
I completely understand. I'm experimenting with different operating systems on an old AMD A8-5600K, which helps avoid messing up the main PC.
My latest laptop cost me about US $900. I'd be nervous carrying a $2,300 one if it got dropped!
Be careful when making changes. Good luck.
Have you experimented with ThrottleStop to boost turbo power limits? Here are the configurations I apply for my 14900HX. The high power settings are necessary because this model demands maximum output.
Even with a considerable undervolt, it still requires 230W to operate both the P cores and E cores at their full rated speed. I set V/F Point 1 to 150 using ThrottleStop, then reduce the P cores and P cache voltage by -150 mV.
https://imgur.com/OAdjgpa
View: https://i.imgur.com/OAdjgpa.png
With a +100 MHz overclock for both P and E cores, a 39K Cinebench R23 run is achievable.
https://imgur.com/jAG9ZsJ
View: https://i.imgur.com/jAG9ZsJ.png
I’m using a MSI Vector 17 laptop. I’ve learned that the voltage regulators Lenovo employs are often the bottleneck in the Legion series.
Don’t let anyone dampen your enthusiasm. Achieving peak performance from a laptop is quite rewarding. Share some images of your water cooling setup once you’ve accomplished it.
I adjusted the settings in my bios for the pl1 and pl2, but the software still displays 105 watts. It only shows that amount. I believe this is because of thermal limitations preventing higher output. It seems like something has changed—now it’s showing dynamic power limits in HWINFO. I think if the thermal performance improves, it should be able to reach that level. I’ll run the test again after installing the new water cooler and update then. If you need to tweak any other bios settings, just let me know. Thanks a lot!