TDP still confuses me. I understand the definition, but I cannot reconcile it to the fact that a range of CPU's, say the Athlon X2 3600+ through to the 5400+ with clock speeds from 1.9GHz through to 2.8GHz can have the same TDP. Speed is generally related closely to power. What this indicates is that if you under-clock a 5400+ CPU from 2.9GHz to 1.9GHz it will use considerably less power than the 3600+ processor. As the processors have the same architecture (internal layout, manufacturing process etc) I find this hard to understand.
The main things I did to reduce the overall power draw were to use a 2.5" disk, on-board graphics, no CD-ROM (except when required for installation) and a pico-PSU. One thing with PSU's, even the 80+ efficiency ones, is that their efficiency drops way down at very low power (say 10-20% of max) so a 450W PSU running at 7% wastes quite a lot of power in the overall power draw of the system. I used a 120W pico-PSU just so it could cope with the start-up power, but even that is generally running between 25-30% which is a bit better on the efficiency front.
It is nice to have confirmation that you can get Gb throughput. I am jealous - very.
There is one thread
in this forum you may want to read about the 82579V where the O/P had to install his own driver. The process is pretty straightforward. Tim has precompiled kmod e1000e drivers here
and they more recent than those referred to in the post.. It may just be the o/p had a problem with his board and it will be OK for you, but when you install, I'd make sure you had your second NIC installed at the same time to give you a good chance of LAN connectivity. If you don't have any LAN connectivity it is harder to upgrade the drivers.
ClearOS 5.2 is not good for wireless. There are some posts on this forum but you'll need to track down how to configure it. You also need to ensure the wireless module supports master mode so it can be an access point. I believe 6.1 will have better wireless support but it is only in beta at the moment.