I added the NVMe case to my Argon One V2 case with a Pi 4B, and the idle temperature increased from 40-45C to 50-55C, that’s 10C just by adding the NVMe expansion case, I know NVMe SSD uses more energy, but in this test they were idle, the SSD and the whole unit, therefore there was no power consumption from the SSD, I tried with three different brands of SSDs and the same result.
I do have some SATA SSDs available, and I would like to try with it, maybe it will use less power, any previous experience, thanks