As with the trays, the cabinet is built using less metal than rival chassis: Rather than sliding out trays on rails, there are tabs on either side. Again, this eco-friendlier design means lower building and shipping costs.
One final point to raise: Rackable claims the CloudRack C2 is capable of delivering up to 32 cores per unit (1,280 cores per cabinet), or a remarkably high storage capacity of up to 8TB per unit. A high level of density is mighty appealing to a space-starved datacenter operator.
All in all, I like what Rackable Systems has done with the CloudRack C2, squeezing out greater energy efficiency while reducing cooling requirements, all of which translates to less wasted power. That means lower utility bills and fewer carbon emissions. On top of that, from an Earth-friendly perspective, I like how the company has reduced the amount of metals and other components in the system -- which also results in less fuel consumption for shipping (lower costs, fewer GHGs), not to mention fewer points of failure from an operational perspective. Better for the datacenter, better for bottom line, better for the planet. It's another fine example of a step forward for green IT.