DrizzleV

You are right, I replace the SSD and can now reach 3-4W (C10). Thanks a lot. One thing worth noticing is that the ASPM activation for the Realtek NIC does not persist, so one should put the cmd in crontab or boot service.

Thanks, I just realized I did this before, but the command failed. I found that there isn't l1_2_aspm file, but only l1_1_aspm. Anyway I set it to 1 and it still doesn't go further than C3, but power consumption is now 6W. If I turn off the Realtek controller completely, it goes down to 4W. Update: I enable L1.2 substate in BIOS, and set l1_2_aspm to 1. It's still in C3.

I also have a similar system: - ASUS Pro H610T D4-CSM - Intel i3 12100 - 1x 16GB Crucial DDR4 3200MHz - 19V 250W power brick - SSD SKHynix 512GB The lowest idle consumption is 12W. C state couldn't go any further than C3. I wonder if the Realtek NIC prevents it (as many ppl reported), but it seems not to be a problem for you??