There are four two CPU boards in the chassis, each one facing the other. The airflow is straight through, and it has six massive fans and very little in the way of the air. The 'rest' of the system is sitting in a compartment behind the last of the CPU fans, and it is a fairly conventional mobo.
The cards are removable, as you can see above, it is a simple plug and play thing. The nice thing about this is, if you buy an H8502 now, when 1207 parts come out in a few months, you can just buy new cards. If you want to update the rest of the mobo, you can do that too without buying all new CPUs.
Basically, Iwill took the best of the first gen and thought it through with an eye on flexibility. If you need an 8-way Opteron, you could do a lot worse than this box. µ
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