As you can see my setup with hooked up "things", only my lte stick is not attached.
LOT (list of things)
SDD Samsung in the (ICY)box.
Camera attached
Serial for my terminal
Network LAN
Network USB Edimax 300 GB or MB (who cares, hehehe)
3G Modem working
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 032: ID 0e8d:00a5 MediaTek Inc.
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 032: ID 152d:2509 JMicron Technology Corp. / JMicron USA Technology Corp. JMS539 SuperSpeed SATA II 3.0G Bridge
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 7392:7822 Edimax Technology Co., Ltd
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I have this precision power supply and had it set to 5.00, where any (but only) external SATA->USB Bridge failed. All of a sudden I had this crazy idea to crank up the voltage a little and voila -> approx at 5.2 I had a crazy dmesg output that the drive had read errors and cache issues. Then later I got it running at 5.25 and further perform without errors at 5.3. So I set the perfect safe level of no failure to 5.35. So what do you say about that? OPI -> into the bin?
Now this setup, where it is fully headless (no HDMI/DVI, etc. -> all powered off, the DRAM set to lowest 480, but all cores powered up) we can definitly say on peak performance it uses 5W.
Peak performance is Modem SMS and internet up/down from and to harddrive and surfing through hotspot.
all the best and I hope to solve a lot of SATA problems here and gave a real view of performance/consumption.