Support for RTL838x based managed switches

I like to be power conscious of the devices I have powered on 24/7, and am wondering if the RTL838x is a power hungry SoC, or simply, more ports = more power.

I only have a 28 port model in my possession for comparisons sake, so for those of you with a "Kill A Watt TM" (or equivalent AC power meter), I'm curious what desktop models (8 or 10 ports, especially with PoE capability) typically consume?

DGS-1210-28MP
11W during Boot
14W booted with the fans on auto (Medium?)
15W with one Yealink T23G connected

GS308P (Link to thread on BCM53128 switch hacking)
1W at Idle
3W with one Yealink T23G connected