When ARM announced the ARMv8 64-bit instruction set last week, and Bloomberg reported that HP would sell ARM-based servers soon, we thought the two revelations had something to do with one another. That's not entirely true. Today, Hewlett-Packard confirmed that it's building racks of ARM chips, but they're not 64-bit at all, but rather a new 32-bit quad-core processor from Calxeda called the EnergyCore. That silicon uses just 1.5 watts per processor, and in a quad-core SoC configuration with 4GB of RAM, Calxeda claims it can provide a server node (complete with a solid state drive) that uses just five watts when active and half a watt when idle.