nvidia tesla k20

I've got a Tesla K20 GPU card that I want to try out. I've found very little documentation. For example, the K20's user manual contains nothing but specifications -- no instructions. It seems to be written for system integrators who don't need to be told how to use the card because they just...

I have two Tesla k20 gpgpu cards for the high double floating point computational power. Is there a consumer or inexpensive workstation motherboard compatible with the cards? That would be optimal. Newer is better than older. If not, what inexpensive servers are compatible with the k20...