noidea_77 :
Supermicro X8DTH-6F, Intel Server Board S2600GL4 and some other server boards.
Both of these are too expensive and overkill... other than running Windows 7 and internet access, any old slow motherboard will do. We are not going to use the CPU for anything than Windows 7 and a very small program, which makes heavy use of the GPUs. Cost is a major concern... Thanks....