By Timothy Prickett Morgan
With the International Super Computing conference underway this week, the Top 500 ranking of the world’s most powerful supercomputers is out, and the bi-annual is just starting to be transformed by the advent of cheap flops embodied in graphics co-processing engines from Nvidia and Advanced Micro Devices.

While the 1.76 petaflops “Jaguar” Opteron cluster built by Cray for the Oak Ridge National Laboratory held onto its top spot on the list without any changes since last November, the “Nebulae” cluster made by Dawning for the National Supercomputing Center in Shenzhen in China is nipping at Jaguar’s tail with a blade machine that marries Intel’s Xeons to Nvidia’s GPU co-processors.

As you will see from perusing the Top 500 list, Jaguar is an XT5 massively parallel cluster with a 3D torus interconnect that currently has six-core Opteron 8400 processors and uses Cray’s SeaStar2+ interconnect.

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