Cray x2

Cray X2 is a vector processor host for the Cray XT5h massively parallel hybrid supercomputer , developed by Cray and launched in 2007.

X2 was developed under the code name Black Widow , and it was originally supposed to create a separate supercomputer system on its basis, which would become the successor to the Cray X1 vector parallel supercomputer. However, in the end, X2 was launched as an option for the XT5h hybrid system, in which X2 was installed as a blade node and supplemented the base XT5 supercomputer with vector computing functions. The goal of this step is to provide customers with the flexibility of completing the XT5 supercomputer system for specific specific calculations ^[1] .

One Cray X2 blade housed two compute nodes, each of which had 4 vector processors connected into a symmetrical multiprocessor , and from 32 to 64 GB of RAM. The processors worked at a frequency of 1.3 GHz, had 8 vector pipelines, 512 KB cache in the second level and 8 MB in the cache of the third level. The peak computing power of each processor was 25.6 Gflops , and each node was more than 100 Gflops . X2 processors connected to the topology of the " fat tree " using YARC routers. X2 nodes were connected to other nodes of the XT5h system using the SeaStar2 + network connection. Each rack could accommodate 16 blades with a total of 128 processors in the rack. Up to 256 X2 blades could be installed in the XT5h system ^[2] .