$171 NAS Killer v3.0 — Serverbuilds.net
Intel S5500BC (dual socket 1366)
I’m going to be straight with you – this board is just OK.
It’s not as good of a deal as the GA-7TESM from the NAS Killer 2.0, I doubt anything will touch that. However, this board is cheap, it’s much smaller with its ATX form factor, and has the features we need. Unfortunately, due to the location of the CPU sockets, you will not be able to fit a GPU, but it is possible to fit SAS controllers, SATA cards, network cards, and other smaller AOC’s. It also only has support for dual-channel memory in comparison to the GA-7TESM’s triple-channel, and is missing the onboard SAS-2008 controller as well. However: it only requires one EPS connector for dual CPU, meaning you can use any power supply, even without an EPS splitter.
Currently, the ebay seller has the board listed for $41 OBO, free shipping – he accepted $35 instantly. I wouldn’t be surprised if he accepts less than $35.
If that seller runs out of stock, there is a S5500BCR (supports SATA RAID) here for $75 OBO + $12 shipping.
Included with the motherboard package – IO shield, dual E5506 processors (you will need them to update the BIOS to support 5600 series processors)