[jleahy]

Well the G4932E runs at exactly half the clock rate, so it's not surprising that it uses half the power. Just disable one of the two cores and now you have a 3.8GHz single core processor with a TDP of 27W:

echo 0 > /sys/devices/system/cpu/cpu1/online

Alternatively you could reduce the clock speed to 1.9GHz for both cores:

cpufreq-set -f 1900 (need to load the userspace governor also)

And of course you can schedule this to happen at a particular time of day.

[blattimwind]

TDP is largely irrelevant. You are interested in either energy per task or power for availability, neither of which you can figure out from a datasheet. The latter is essentially the same as idle power, but depends on what services you run.

[jleahy]

Sounds like vbezhenar cares about being woken up at night by a noisy server, in that case maximum power draw regardless of load is what matters.

[blattimwind]

Why do you expect high load at night?

[MrGilbert]

Backups come to mind. For me, I schedule them at night.

[thedance]

Have a look at the crontabs that ship with Ubuntu.