# Framework 16 laptop: override 'AC power' performance mode to NOT max CPU?

**URL:** <https://community.frame.work/t/framework-16-laptop-override-ac-power-performance-mode-to-not-max-cpu/75223>\
**Category:** Linux\
**Tags:** ubuntu\
**Created:** [September 14, 2025, 9:43pm UTC](https://community.frame.work/t/framework-16-laptop-override-ac-power-performance-mode-to-not-max-cpu/75223 "2025-09-14T21:43:21Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![lbohn](https://sea1.discourse-cdn.com/flex001/user_avatar/community.frame.work/lbohn/32/17271_2.png) [@lbohn](https://community.frame.work/u/lbohn)\
**Post date:** [September 15, 2025, 11:05pm UTC](https://community.frame.work/t/framework-16-laptop-override-ac-power-performance-mode-to-not-max-cpu/75223/11 "2025-09-15T23:05:15Z")

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> [@Thomas\_Ward](#):
>
> I purchased this FW16 back in February of this year, I don’t know if it’s old enough to have liquid metal

Most likely not. The FW16s shipped with LM were pre-orders. The manufacturing process switched to PTM7958 during the last few pre-order batches, if memory serves.

To be certain, check your FW16’s serial number:

 ![image](https://us1.discourse-cdn.com/flex001/uploads/framework3/original/3X/6/e/6e861b4b5a7013988f2a5aab5d7a233674ccb26e.jpeg)

[[source](https://knowledgebase.frame.work/where-can-i-find-the-serial-number-for-my-framework-device-Hy4f8Jet)]

or

> `sudo hwinfo --bios`

or perhaps

> `sudo dmidecode -t chassis`

[[source](https://community.frame.work/t/where-is-the-serial-number/68126)]

![image](https://us1.discourse-cdn.com/flex001/uploads/framework3/original/3X/6/6/66d4c4094ad9103bb57925e0cad7fd7657b9fdbe.png)

If the 11th, 12th and 13th digits are less than 444, the machine was shipped with liquid metal; greater than 444, it shipped with PTM.

> Early Framework Laptop 16 devices (serial numbers where the 11th, 12th and 13th digits are less than 444) used liquid metal thermal interface material

[[source](https://framewiki.net/products/framework-laptop-16/7040-series)]

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