The Cray XT4 (codenamed ''Hood'' during development) is an updated version of the

Cray XT3 The Cray XT3 is a distributed memory massively parallel MIMD supercomputer designed by Cray Inc. with Sandia National Laboratories under the codename '' Red Storm''. Cray turned the design into a commercial product in 2004. The XT3 derives muc ...

supercomputer. It was released on November 18, 2006. It includes an updated version of the SeaStar interconnect router called SeaStar2, processor sockets for

Socket AM2 The Socket AM2, renamed from Socket M2 (to prevent using the same name as Cyrix MII processors), is a CPU socket designed by AMD for desktop processors, including the performance, mainstream and value segments. It was released on May 23, 2006, ...

Opteron Opteron is AMD's x86 former server and workstation processor line, and was the first processor which supported the AMD64 instruction set architecture (known generically as x86-64 or AMD64). It was released on April 22, 2003, with the ''Sled ...

processors, and 240-pin unbuffered DDR2 memory. The XT4 also includes support for

FPGA A field-programmable gate array (FPGA) is an integrated circuit designed to be configured by a customer or a designer after manufacturinghence the term ''Field-programmability, field-programmable''. The FPGA configuration is generally specifi ...

coprocessors that plug into riser cards in the Service and IO blades. The interconnect, cabinet, system software and programming environment remain unchanged from the

. It was superseded in 2007 by the Cray XT5.

External links

News release regarding ''Hood''

on HPCwire
Cray XT4 at top500.org

References

Xt4 X86 supercomputers {{super-compu-stub