Next up is an Intel Atom Z530 "Poulsbo" system in the form of a CompuLab Fit-PC2 NetTop. With the Atom Z530 was 1GB of RAM, Poulsbo graphics, and a 160GB Hitachi HDD.
The Z530 Poulsbo system idled at 8.5 Watts.
Under load on Ubuntu 12.04 with the NPB EP.C workload was just 10.7 Watts for the dual-core part.
EP.C ran at just 8.74 Mop/s on the Atom Z530.
The EP.C result translated to 0.82 Mop/s per Watt. This Atom SoC was more efficient than the Atom 330, but still far behind the PandaBoard ES setups at 1.6~1.78 Mop/s per Watt.