Cisco Systems 2130, 2140 manual Branch Channel B Channel a

Chapter 4 Installing the Cisco ADE 2130 and 2140 Series Appliance Hardware Options

Installing and Removing Memory

The appliance provides eight DIMM slots across two branches (0 and 1) of four channels, channel A through Channel D. Channel A consists of DIMM slots A1 and A2, Channel B consists of DIMM slots B1 and B2, Channel C consists of DIMM slots C1 and C2, and Channel D consists of DIMM slots D1 and D2. The slots associated with each channel, are located next to each other. A diagram on the logic board near the DIMM slots illustrates the location of the DIMM slots. Each slot accepts 533/667-MHz stacked Double-Data-Rate 2 (DDR2) Error Correction Code (ECC) or non-ECC unbuffered memory.

DIMMs are populated in pairs and are populated in the following DIMM slot order (see Figure 4-5):

•A1 and B1

•C1 and D1

•A2 and B2

•C2 and D2

Figure 4-5 DIMM Slots

Branch 0

Branch 1

Channel B

Channel A

A1
DIMM	A2
DIMM B1
DIMM		B2
	DIMM C1
	DIMM C2
		DIMM D1
		DIMM	D2
		DIMM

Channel C Channel D

231197

DIMMs within a given pair must be identical with respect to size, speed, and organization. However, DIMM capacities can be different between different DIMM pairs. For example, a valid mixed-DIMM configuration may have:

•512-MB DIMMs installed in DIMM slots A1 and B1

•1-GB DIMMs installed in DIMM slots C1 and D1 The following restrictions apply:

•Single-channel mode is supported only with a 512-MB DIMM installed in DIMM slot A1.

•For best performance, the number of DIMMs installed should be balanced across both memory branches. For example, a four-DIMM configuration performs better than a two-DIMM configuration and should be installed in DIMM slots A1, B1, C1, and D1. An eight-DIMM configuration performs better than a six-DIMM configuration.

Cisco Application Deployment Engine (ADE) 2130 and 2140 Series Appliance Hardware Installation Guide

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