SiCortex, which is trying to drum up industry backing for its Green Computing Performance Index, has updated the suite of benchmarks to focus more squarely on performance vis-a-vis energy consumed. It measures performance-per-wat using the HPCC benchmark suite and is meant specifically for pretty high-end systems (like the ones you'd find crunching some serious scientific or industrial computations). Of course, the company loves the fact that its house-brand computing architecture (non-Intel) just to kick some serious butt. Here's background from a post I did late last year. Curious how your own systems perform? You can find the updated calculator tool here.