| CPU |
XT6 and XT6m: Eight or 12-core 64-bit AMD Opteron 6100 series processors; up to 192 per cabinet
XT5 and XT5m: Quad or six-core AMD Opteron 2000 series processors; up to 192 per cabinet |
| Cache |
64k L1 instruction cache, 64k L1 data cache, 512KB L2 cache per processor core, 12MB (XT6 and XT6m) or 6MB (XT5 and XT5m) shared L3 cache |
| Cores |
1,536 or 2,304 processor cores per cabinet (XT6 and XT6m) |
| Peak Performance |
12.2 to 20.2 teraflops per system cabinet |
| Main Memory |
32 GB or 64 GB registered ECC DDR3 SDRAM (XT6 and XT6m) or 16 GB to 32 GB registered ECC DDR2 SDRAM (XT5 and XT5m) per compute node |
| Memory Bandwidth |
85.3 GB/sec (XT6 and XT6m) or 25.6 GB/sec (XT5 and XT5m) per compute node |
| Interconnect |
1 Cray SeaStar2+ (XT6, XT6m, and XT5) or SeaStar (XT5m) routing and communications ASIC per compute node |
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XT6 and XT5: 6 switch ports per Cray SeaStar2+ chip, 9.6 GB/sec each (57.6 GB/sec switching capacity per Cray SeaStar2+ chip)
XT6m and XT5m: 4 switch ports per Cray SeaStar2+ (XT6m) or SeaStar (XT5m) chip, 9.6 GB/sec each (38.4 GB/sec switching capacity per chip) |
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3D torus (XT6 and XT5) or 2D torus (XT6m and XT5m) interconnect |
| External I/O Interface |
Gigabit Ethernet
10 Gigabit Ethernet |
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Fibre Channel (FC) |
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InfiniBand |
| Disk Storage |
Full line of FC-attached disk arrays with support for FC and SATA disk drives |
| File System |
Lustre, Data Virtualization Service (DVS); XT6 and XT6m allow support for NFS, external Lustre and other file systems |
| System Administration |
Cray System Management Workstation (SMW)
Graphical and command line system administration |
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Single-system view for system administration |
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PBS Professional™ job management system
Adaptive Computing Moab job management system |
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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 |
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More than 50 measurement points monitored per Cray XT system blade |
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Full ECC protection in the Cray SeaStar2+ (XT6, XT6m, and XT5) or SeaStar (XT5m) chip |
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Redundant power supplies |
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Redundant voltage regulator modules (VRMs) |
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Redundant paths to all system RAID |
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Variable-speed axial turbofan with integrated pressure and temperature sensors |
| Reliability Features (Software) |
HSS system monitors operation of all operating system kernels
Lustre file system object storage target failover; Lustre metadata server failover |
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Software failover for critical system services including system database, system logger, and batch subsystems
NodeKARE™ - Node Knowledge and REconfiguration (XT6 and XT6m) |
| Operating System |
Cray Linux Environment: components include SUSE Linux™, HSS and SMW software
Extreme Scalability Mode (ESM) and Cluster Compatibility Mode (CCM) (XT6 and XT6m) |
| Message Passing Libraries |
MPI 2.0, Cray SHMEM, other standard MPI libraries using CCM |
| Compilers |
PGI™ Compilers, Cray Compiler Environment, Pathscale: support for Fortran 77, 90, 95; C/C++, UPC, Co-Array Fortran |
| Power |
XT6 and XT6m: 45 - 54.1 kW (45.9 - 55.2 kVA) per cabinet, depending on configuration; circuit requirements: 3 phase wye, 100 AMP at 480/277 and 125 AMP at 400/230 (3 phase, neutral and ground)
XT5 and XT5m: 32 - 42.7 kW (32.7 - 43.6 kVA) per cabinet, depending on configuration; circuit requirements: 80 AMP at 400/480 VAC (3 phase and ground) |
| Cooling Requirements |
Air-cooled, air flow: 3,000 cfm (1.41 m3/s); intake: bottom; exhaust: top
Optional ECOphlex liquid cooling (XT6, XT6m, and XT5) |
| Dimensions (Cabinet) |
XT6 and XT6m: H 93 in. (2,362 mm) x W 22.50 in. (572 mm) x D 56.75 in. (1,441 mm)
XT5 and XT5m: H 80.50 in. (2,045 mm) x W 22.50 in. (572 mm) x D 56.75 in. (1,441 mm) |
| Weight (Maximum) |
XT6 and XT6m: 1,600 lbs. per cabinet (725 kg) air cooled; 2,000 lbs. per cabinet (907 kg) liquid cooled
XT5 and XT5m: 1,529 lbs. per cabinet (694 kg) |
| Acoustical Noise Level |
75 dBA at 3.3 ft (1.0 m) |
| Regulatory Compliance |
UL 60950-1, CAN/CSA - C 22.2 No. 60950-1, CE-mark (XT6 and XT6m), CB Scheme Investigation to IEC/EN 60950-1 (XT5 and XT5m), RoHS, WEEE |
| Safety |
XT6 and XT6m: FCC Class A, VCCI Class A, ICES-003, EN 50022:2006 Class A, AS/NZS CISPR 22:2006, EN 55024: 1998 +A1:2001 +A2:2003
XT5 and XT5m: FCC Class A, DOC Class A, VCCI Class, CISPR 22, EN 50022 Class A, AS/NZS 3548, EN 50082-1, EN 61000-3-2, EN 61000-3-3, Statskontoret 26.2 Category 1 |