Ah, I think to get 64GB from a Thinkpad you’d have to move up to a P series, and even the P16s and P14s that are based on the T16 and T14 will be significantly warmer and louder than those others. They’re very much tuned for performance. Unfortunately, Lenovo is soldering RAM far more on their AMD models than the Intel models, so you won’t be able to run above spec.