Xeon Phi

[villa1n]

Intel insist 1 TFLOP/s sustained performance in DGEMM.
http://software.intel.com/en-us/blog...bit-emotional/

from Anand

The Top 500 results score achieves 118 TFlop with 9800 cores. Making the big assumption that all of the performance was from a 50 core MIC card, that'd put performance per card at 602 Gflop double precision. At 64 cores per card, double precision performance would be 770 Gflop. Chances are that part of the result also used the SandyBridge CPU's, otherwise it would have made more sense to go with the quad core Xeons to make the power consumption figures look better. How much this would skew results would depend on the system configuration. Two Xeon E5-2670's per MIC card would have a bigger increase the performance per card rating than one Xeon E5-2670 for four MIC cards would.

There are a few factors that could raise those scores. As a prototype, clock speeds were likely conservative and there is also the possibility of turbo coming into play. Further more results for a single card and host will likely be higher due to the removal of network overhead.

Regardless, these results paint Xeon Phi as merely competitive instead of having a decisive performance edge over its GPU counter parts.

The DGEMM at 20W's is pretty crazy though, very data center friendly.