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Cray XK7 Specifications

Processor 16-core 64-bit AMD Opteron 6200 Series processors, up to 96 per cabinet; NVIDIA® Tesla® K20 GPU Accelerators, up to 96 per cabinet
Memory 16 GB or 32 GB registered ECC DDR3 SDRAM and 6 GB GDDR5 per compute node
Memory bandwidth: 4 channels of DDR3 memory per compute node
Compute Cabinet AMD processing cores: 1,536 processor cores per system cabinet
Peak performance: 100+ Tflops per system cabinet

1 Gemini routing and communications ASIC per two compute nodes
48 switch ports per Gemini chip (160 GB/s internal switching capacity per chip)
3-D torus interconnect
System Administration
Cray System Management workstation
Graphical and command line system administration
Single-system view for system administration
System software rollback capability
Reliability Features (Hardware)
Cray Hardware Supervisory System (HSS) with independent 100 Mb/s management fabric between all system blades and cabinet-level controllers
Full ECC protection of all packet traffic in the Gemini network
Redundant power supplies; redundant voltage regulator modules
Redundant paths to all system RAID
Reliability Features (Software) HSS system monitors operation of all operating system kernels
Lustre file system object storage target failover; Lustre metadata server failover
Software failover for critical system services including system database, system logger, and batch subsystems
NodeKARE (Node Knowledge and Reconfiguration)

Operating System Cray Linux Environment (components include SUSE Linux SLES11, HSS and SMW software)
Extreme Scalability Mode (ESM) and Cluster Compatibility Mode (CCM)
Compilers, Libraries & Tools PGI compilers, Cray Compiler Environment, PathScale, CUDA, CAPS
Support for the ISO Fortran standard (2008) including parallel programming using coarrays, C/C++ and UPC
MPI 2.0, Cray SHMEM, OpenACC directives-based programming, other standard MPI libraries using CCM
Job Management PBS Professional, Moab Adaptive Computing Suite, Platform LSF
External I/O Interface InfiniBand, 10 Gigabit Ethernet, Fibre Channel (FC) and Ethernet
Disk Storage Full line of FC-attached disk arrays with support for FC and SATA disk drives
Parallel File System Lustre, Data Virtualization Service allows support for NFS, external Lustre and other file systems
Power 45-54.1 kW (45.9 - 55.2 kVA) per cabinet, depending on configuration
Circuit requirements: three-phase wye, 100 AMP at 480/277 and 125 AMP at 400/230 (three-phase, neutral and ground)
Cooling Air-cooled, air flow: 3,000 cfm (1.41 m3/s); intake: bottom; exhaust: top
Optional ECOphlex liquid cooling
Dimensions (Cabinet)
H 93 in. (2,362 mm) x W 22.50 in. (572 mm) x D 56.75 in. (1,441 mm)
Weight (Maximum) 1,600 lbs. per cabinet (725 kg) air cooled; 2,000 lbs. per cabinet (907 kg) liquid cooled
Regulatory Compliance UL 60950-1, CAN/CSA - C 22.2 No. 60950-1, CE-mark, RoHS, WEEE
Safety FCC Class A, VCCI Class A, ICES-003, EN 50022:2006 Class A, AS/NZS CISPR 22:2006, EN 55024: 1998 +A1:2002 +A2:2003