report.

Subjectively, though, the P1 is noticeably quieter than my Yoga Pro 9i, both under load and at idle. The fan noise also seems lower-pitched and less annoying.

For me, this is a major improvement.

# Second NVMe M.2 slot

There is an interesting detail in the Gen 9 PSREF.

There is a difference between WWAN and non-WWAN configurations: the WWAN module uses one of the M.2 slots, meaning that you can't have two SSDs installed at the same time in the WWAN configuration.

What isn't immediately obvious is whether this is a permanent limitation.

I needed a second SSD temporarily so I could copy all my files from the old Yoga to the new P1, so I decided to investigate.

It turns out that the second M.2 slot is occupied by a WWAN interposer module.

https://preview.redd.it/7zrtl1wphjmh1.jpg?width=2252&format=pjpg&auto=webp&s=ba7549d17ac01aa4816d9f86a25a4c9ed4a08e74

https://preview.redd.it/ej1m62wphjmh1.jpg?width=2252&format=pjpg&auto=webp&s=2a1de1fb0d98f8bd54a803e2e67b1e5f6d8bdadc

https://preview.redd.it/8vovd2wphjmh1.jpg?width=2252&format=pjpg&auto=webp&s=1b5b339ac7dac4960fa018b822329666e9495a6c

Basically, this is an adapter that occupies the motherboard's M.2 slot while providing its own M.2 slot for the WWAN modem.

Lenovo's instructions strongly advise against installing an SSD in the interposer's slot.

However, you can simply remove the entire interposer from the motherboard and install a second SSD directly into the motherboard's M.2 slot.

It works normally.

https://preview.redd.it/qjylq4owhjmh1.jpg?width=2252&format=pjpg&auto=webp&s=2f8f288562d78618a9fa475ff7459b73c3aeba62

So, with the WWAN version, you can temporarily use two SSDs — at the cost of temporarily sacrificing the WWAN functionality.

# Battery life

Finally, a Windows workstation-class laptop that can actually live without being permanently connected to a charger.

My general impression of battery operation is surprisingly close to my wife's M4 MacBook.

When running on battery, you don't notice a significant performance drop when you unplug it, provided you're not using the dGPU, and the battery just keeps going.

I haven't performed a proper standardized battery test yet, but based on my actual usage so far, I expect roughly 6–8 hours of normal use (not gaming).

That's a massive improvement over the 1–2 hours I was getting from the Yoga.

For a machine with this level of performance, this is probably one of the most important improvements for me.

# Issues so far

So far, I've encountered only one actual issue.

When I enabled Dynamic Refresh Rate in Windows, the display occasionally started showing glitches.

Usually this appears as black lines or colorful junk/artifacts that flash on the screen for a fraction of a second.

I'm not sure exactly what causes it, but it definitely seems to be related to VRR.

The problem can be eliminated either by disabling Dynamic Refresh Rate in Windows or by disabling Panel Self Refresh in Intel Graphics Software → Display settings.

I'll keep monitoring this to see whether a driver or firmware update fixes it.

# Cleaning the cooling system

I also have one concern regarding maintenance.

It appears that the fans cannot be removed separately from the entire cooling assembly, which could make cleaning the fans and heatsinks considerably more difficult.

I haven't yet had to clean it, so I can't say how serious this will be in practice. But it's something I'll be watching, particularly because I tend to keep my laptops for several years.

# Final thoughts

Overall, this is pretty much the dream machine I've been looking for.

It combines the things I liked about the Legion — performance and responsiveness — with the things I liked about the Yoga — portability and an excellent display — while fixing some of the biggest problems I had with both.

The keyboard is excellent, the display is fantastic, performance is very good, the machine is surprisingly quiet, and — finally — battery life is good enough that I don't feel chained to the power adapter.

It's definitely expensive, but for my particular