IBM 440 manual Cec

CEC 1

IBM XA-32 core chipset

CPU 1 CPU 2 CPU 3 CPU 4

400 MHz					3.2 GBps
32 MB				Processor &
L4 cache	3.2 GBps			cache controller
					3.2 GBps
SDRAM		3.2 GBps
					Memory
SDRAM					controller
			3.2
			GBps			2 GBps
SDRAM			100MHz
			4-way
SDRAM			interleave

SMP Expansion Ports (3.2GBps)

2 GBps

	RXE
Expansion		PCI bridge		66 MHz
Port A
(1 GBps)
	66 MHz		33 MHz
				Video
	Ultra160
	SCSI			USB
				Kbd/Ms
	Gigabit
	Ethernet			RSA

Bus A

PCI bridge

B-100 C-133 D-133

64-bit	64-bit	64-bit
66 MHz	100 MHz	133 MHz

Figure 1-4 xSeries 440 system block diagram — one SMP Expansion Module

The component that contains the CPUs, processor/cache controller, memory controller, memory, and cache is called the SMP Expansion Module (or central electronics complex—CEC). The Xeon MP-based models of the x440 ship with one SMP Expansion Module with two or four CPUs and 2 GB or 4 GB of RAM. The Xeon DP-based models have either two CPUs in one SMP Expansion Module or four CPUs in two SMP Expansion Modules.

Tip: The terms central electronics complex, CEC, and SMP Expansion Module are used interchangeably in relation to the x440. We use SMP Expansion Module in this redbook.

8IBM ^xSeries 440 Planning and Installation Guide