ClearSpeed is talking from the IDF this week about it’s dual-core Intel machine accelerated with a pack of e620 cards:
With each ClearSpeed Advance e620 accelerator delivering 80 GigaFLOPS peak double precision performance and over one GigaFLOP per watt of sustained LINPACK performance, the entire cluster had a maximum power consumption of less than 7KW and completed the benchmark in just 14 minutes, half the time required by the non-accelerated system. The energy used to achieve this TeraFLOP performance was approximately 1.5KWh, costing a mere 15 cents assuming a cost of 10 cents per KWh.
The whole thing took 16u of rackspace. For perspective
To underscore what a difference a decade makes, in 1997 Intel impressed the industry with the world’s first-ever terascale system known as ASCI Red that was delivered to Sandia National Laboratories. With 4,510 compute nodes the then state-of-the-art and record-breaking system occupied 2,500 square feet, consumed 850KW and cost $55 million.