Calxeda's EnergyCard atop a HP Redstone server prototype. Source: Jon Snyder.

On Tuesday, Austin-based startup Calxeda launched its EnergyCore ARM system-on-chip (SoC) for cloud servers. At first glance, Calxeda’s looks like something you’d find inside a smartphone, but the product is essentially a complete server on a chip, minus the mass storage and memory. The company puts four of these EnergyCore SoCs onto a single daughterboard, called an EnergyCard, which is a reference design that also hosts four DIMM slots and four SATA ports. A systems integrator would plug multiple daughterboards int...