• 136 CPUs (56 Xeon 2.0 GHz and 80 Pentium III 933MHz)
• 1TB of fast storage space
• 176GB RAM
• 100Mb Ethernet
• 1000Mb Myrinet (connecting 40 nodes)

• a-nodes - 64bit 2.0GHz + Ethernet
• b-nodes - 32bit 933MHz + Myrinet

a-node Hardware

Processors
Cores	Clock Speed	Brand	Model
4	2.0GHz	Intel	Xeon Core2
Memory
Capacity	Type	Speed
4GB	DDR	533MHz
Network
Type	Speed	Brand	Model
Ethernet	1000Mb/sec	Broadcom	NetXtreme II BCM5708
Storage
Capacity	Interface	Speed	Brand	Model
80GB	SATA	57MB/sec	Western Digital	WD800JD-75MS

b-node Hardware

Processors
Cores	Clock Speed	Brand	Model
2	933MHz	Intel	Pentium III
Memory
Capacity	Type	Speed
1.5GB	PC133	133MHz
Network
Type	Speed	Brand	Model
Ethernet	100Mb/sec	Intel	e100
Myrinet	1000Mbit/sec	Myricom
Storage
Capacity	Interface	Speed	Brand	Model
20GB	ATA-100	20MB/sec	Western Digital	Caviar

Processors
Cores	Clock Speed	Brand	Model
4	1.8GHz	Intel	Xeon Core2
Memory
Capacity	Type	Speed
2GB	DDR	533MHz
Network
Type	Speed	Brand	Model
Ethernet	1000Mb/sec	Broadcom	NetXtreme II BCM5708
Storage
Capacity	Interface	Speed	Brand	Model
80GB	SAS RAID-5	177MB/sec	Seagate	ST336754SS
160GB	SATA RAID-1	74MB/sec	Seagate	ST3160815AS

Ethernet networking is provided by the HP ProCurve switch with 128 Fast Ethernet ports and 3 Gigabit Ethernet ports. All ports are copper. Switch is tolerant to resets/reboots, usually it does not need any maintenance or configuration. One deficiency - it is not fully non-blocking, the internal banchwidth is less than the sum of the port throughput. Typical message roundtrip latency is between 100 and 200 microseconds for 64 byte messages. Maximum measured NetPIPE TCP/IP bandwidth is 90 Mbps for Fast Ethernet and 340 Mbps for Gigabit Ethernet. Supplier: RackSaver Myrinet connects 40 b-nodes. Each of these nodes has a Myrinet-2000 card (M3F-PCI64B-2) connected by a copper cable to the cross-bar switch. Routing logic is on the cards themselves so the switch is merely an interconnect with an "On/Off" switch. Typical message roundtrip latency is between 9 and 11 microseconds for 64 byte messages. Maximum measured NetPIPE MPI bandwidth is 460 Mbps. Supplier: Myricom Inc.

Switches Type Number of ports Latency Bandwidth HP ProCurve 128 Fast Ethernet ports and 3 Gigabit Ethernet ports 100 and 200 microseconds for 64 byte messages 90 Mbps for Fast Ethernet and 340 Mbps for Gigabit Ethernet Myrinet   9-11 microseconds for 64 byte messages 460 Mbps

Processors
Cores	Clock Speed	Brand	Model
2	1.8GHz	AMD	Dual-core Opteron
Memory
Capacity	Type	Speed
2GB	DDR	533MHz
Network
Type	Speed	Brand	Model
Ethernet	1000Mb/sec	Broadcom	Tigon3
Storage
Capacity	Interface	Speed	Brand	Model
40GB	ATA-133	53MB/sec	Seagate	ST340014A
1TB	SATA RAID-6	69MB/sec	Seagate	ST3500630NS