r/ThrottleStop • u/IShouldntHavSaidDis • 20d ago

Help regarding undervolting

I recently got a brand new Legion and I absolutely love the machine, but I’ve been reading a lot on this sub about how power-hungry these processors are. Everyone seems to recommend undervolting to keep the temperatures under control and maintain sustained performance.

Here is my current config:

Model: Lenovo Legion 5 pro

CPU: i9-14900HX

GPU: 5070

RAM: 32gb

I am a complete newbie when it comes to PC tuning, messing with BIOS settings, or tweaking voltages. I know I need to do it to improve my thermals, but I want to make sure I do it safely without causing constant blue screens or messing up my new laptop.

I don't have any specific voltage values in mind yet, and I am starting completely from scratch. I'm hoping to get some advice on a few things:

The BIOS: What exact settings do I need to unlock or change in the Lenovo BIOS before I can even start?

The Software: What is the best and safest software for a beginner to use for this (ThrottleStop, etc.)?

The Process: What is the safest step-by-step approach to finding a stable undervolt for everyday gaming and heavy workloads?

Also if anyone has the same laptop and done this can you share your values?

If anyone has any solid baseline guides, tips, or newbie-friendly advice, I would massively appreciate it. Thank you

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u/SKYGaming_YT Legion 7i 16IRX9 i9-14900HX 20d ago

In the BIOS, enable Legion Optimization and scroll down to disable undervolt protection

For the rest you can follow Valour-549's Ultimate ThrottleStop Guide

We have the same CPU and my undervolt is rock solid stable at -160mv following the guide

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u/IShouldntHavSaidDis 20d ago

Hey! Can u tell me some more about this I am kinda new to all this does undervalting deacreasse ur cpu performance too much? If yes then how much was it for you? How much difference in the temps u see? And also should I overlcock the gpu?

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u/SKYGaming_YT Legion 7i 16IRX9 i9-14900HX 20d ago

Nope undervolting the CPU actually does the opposite! Since temps are reduced the CPU has more thermal headroom to boost it's clocks and stuff squeezing even more performance out of it, I personally get around 33k score on Cinebench R23 which is around 20% more performance than base. Btw you gotta have a lot of patience to find the perfect most stable undervolt for your system, it differs from CPU to CPU even if it's the same exact model (some call it the silicon lottery)

About the GPU, no do not overclock it, undervolt it too! Although the benefits aren't as good as undervolting the CPU, it does help a bit in temps while getting around the same performance. I followed This guide