Intel SGI Altix 450 manual 4Functional Block Diagram of the Individual Rack Unit IRU

System Architecture

interface. The SHub ASIC memory interface enables any processor in the system to access the memory of all processors in the system.

Another component of the NUMAlink 4 architecture is the router ASIC. The router ASIC is a custom designed 8-port crossbar ASIC. Using the router ASICs with a highly specialized backplane and NUMAlink 4 cables provides a high-bandwidth, extremely low-latency interconnect between all processor, I/O, and other option blades within the system.

Figure 3-4 shows a functional block diagram of the Altix 450 series IRU components.

Left router board
(Slab 0)	F	E	D
NUMAlink	G	rtr	C
		A
NUMAlink	H	A	B

Blade Slot 0

Blade Slot 1

Blade Slot 2

Blade Slot 3

Blade Slot 4

			Right router board
D	C	B	(Slab 1)
	rtr
E		G	NUMAlink
	B
F	A	H	NUMAlink

System control

DC power bus

Power Supply

Power Supply

Figure 3-4Functional Block Diagram of the Individual Rack Unit (IRU)

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