[ricardobeat]

Even if you triple the number of Redstone machines, you'll still use just ~30% of the energy and 7.5% of the cabling.

And each 4 ARM cores have their own memory channels and I/O ports, vs every 6-12 on the Xeon [corrected] (point being that CPU speed is not the only variable here).

[wmf]

The Calxeda chip is quad-core, so there's still sharing.

[ricardobeat]

My bad. The tray picture shows 36 boards, I didn't pay much attention and thought those were 72 single-core nodes.