Asus System Named the Most Efficient Supercomputer
The HPC system, housed in a facility in Germany, is powered by Intel Xeon E5 processors and FirePro GPU accelerators from AMD.Much of the attention at the SC14 supercomputing show last week in New Orleans centered on the release of the Top500 list, a roster of the world's fastest supercomputers. The twice-yearly list is leveraged by system vendors and component makers to tout their technologies and by countries for bragging rights. However, in the computing world—not only in the high-performance computing (HPC) space, but also among enterprises, telecommunications providers and businesses in general—power efficiency often is as important a metric when assessing data center technologies as performance is. That is the driver behind another list that is unveiled during supercomputing shows twice a year—the Green500, a list of the world's most efficient systems. In the most recent list unveiled Nov. 20 at the show in New Orleans, the L-CSC—housed at the GSI Helmholtz Center in Darmstadt, Germany—ascended to the top of the list, with a power efficiency of 5.27 gigaflops per watt (billions of operations per second per watt). The system was built by Asus and is powered by 10-core Intel Xeon E5-2690 v2 "Ivy Bridge" processors and FirePro S9150 GPU accelerators from Advanced Micro Devices. GPU accelerators and x86 coprocessors played key roles in the development of the most efficient systems. Such accelerators are increasingly being used in general in HPC environments, with 75 of the systems on the Top500 list—and four of the top 100—running either GPUs from Nvidia or AMD or Xeon Phi coprocessors from Intel. For the Green500 list, the top 23 supercomputers leveraged accelerators, with the bulk being Nvidia GPUs. However, AMD GPUs and Intel Xeon Phis also were used in some of the systems.
In addition, the second most efficient supercomputer—the Suiren ExaScaler 32U256SC cluster, powered by 10-core Xeon E5-2660 v2 chips—used the many-core Pezy-SC processor from Japanese vendor Pezy Computing as custom accelerators. Each of the accelerators contain 1,024 processing elements that use a pair of ARM926 cores as controller cores, according to organizers of the Green500 list. The Pezy supercomputer, which is running at the KEK High Energy Accelerator Research Organization in Japan, came in with a power efficiency of almost 4.95 gigaflops per watt. It represents the first time a system appeared on the list that used accelerators from vendors other than Nvidia, AMD or Intel.