If you have a moment, could you make a spec from www.scan.co.uk and post the link for the items.
Here's the list:
DN2800MT Motherboard £80
http://skinflint.co.uk/746927
1 GB RAM DDR3 SO-DIMM £9
http://skinflint.co.uk/?cat=ramsoddr3&xf=1454_1024#x...
Case (M350) £37
http://linitx.com/product/12488
Riser card + IO shield (to allow a 2nd NIC) £12
http://linitx.com/product/13552
AC Power Adapter £19
http://www.logicsupply.co.uk/power-supplies/ac-adapt...
Additional Intel Gigabit NIC £21
http://skinflint.co.uk/351749
Intel 6300 Ultimate-N 450 Mbps £20
http://skinflint.co.uk/616661
mSATA 32GB £36 (this is a luxury, I would say just boot from a USB stick)
http://skinflint.co.uk/?cat=hdssd&sort=p&xf=2646_mSA...
Total with one Ultimate-N card (and excluding the mSATA): £198
Add £20 for a second card to provide simultaneous dual-band support.
Please note these are all indicative, I haven't researched every last detail in terms of compatibility, but this is the rough bill of materials needed.
Very similar to my build which I did as I was fed up with reliability problems trying to run even 40Mbit FTTC on my Buffalo router. It was fine until my ISP switched to PPPoE and then things got hairy, made QoS completely impractical. So I built this with the intention of not having to upgrade it again even if I switched to FTTP later.
https://plus.google.com/photos/108348704364791506166...
I run a version of OpenWRT compiled for Atom though:
https://forum.openwrt.org/viewtopic.php?id=35887
Interestingly it had to have power management disabled in the kernel as there is a bug with the on-board Intel Gigabit Ethernet chipset (at least with the newer Linux driver) that causes packet lag/loss, which oddly the PCIe card of identical chipset doesn't suffer from. There are many mentions of this on Google even on lower server class boards with the same chipset.
Fortunately, power management seems to make no difference at all to the power consumption of this board in Linux. Although I never managed to get it below around 16W with any OS regardless of power management setting.
Its also worth noting that you really want PM disabled on a router anyway as the act of PM switching things on, off, frequency scaling, can add latency to the routing performance. Although I doubt its particularly noticeable its always best to aim for optimal performance IMO.
Edited by alexatkin (Mon 28-Jan-13 04:00:45)