RadiSys ATCA-5400 RTM Spécifications télécharger pdf (Page 17)

2INSTALLING MEMORY MODULES

Supported DIMM combinations

ThereareeightDIMMsockets(dualinlinememorymodules)ontheCPMforinstallingVLP

DDR3registeredECCDIMMs.InFigure 2,thesocketsaregroupedintothreechannels.

WheninstallingDIMMs,beginbypopulatingthechannelsthatarefarthestfromtheCPU.

BalanceDIMMsacrossthechannelsbypopulatingslot0foreachchannelfirst,followed

byslot1,andthenslot2.ThepreferredmemoryconfigurationsarelistedinTable 1.

TheCPU’sintegratedmemorycontrollersupportsuptothreechannelsofDDR3DIMMs,

using64databitsand8ECCbitsperchannel.EachchannelsupportsuptothreeDIMMs

(single,dualandquad‐rankDIMMs)andsupportsDRAMspeedsof800MHzand

1066MHzwiththefollowinglimitations:

•ThreeDIMMsperchannelonlysupportsingleanddual‐rankDIMMsat800 MHz.

•At1066MHz,onlytwoDIMMsperchannelareallowedforsingle anddual‐rank.

•Forquad‐rank,onlyoneDIMMperchannelisallowedatanyspeed.

Note:OptimummemoryperformanceisonlyachievedwhenDIMMsofidenticalrankand

sizeareinstalledequallyinallthreechannels.

Figure 2. DIMM slots and channels

Table 1. Preferred memory population options

Number of DIMMs DIMM Type Channels Populated

3 Single-rank C0, B0, A0

3 Dual-rank C0, B0, A0

6 Single-rank C0, C1, B0, B1, A0, A1

6 Dual-rank C0, C1, B0, B1, A0, A1

8 Dual-rank C0, C1, B0, B1, B2, A0, A1, A2

This configuration yields maximum memory.

CPU

CPM Front Panel

Channel A

Channel B

Channel C

B0 B1 B2 A0 A1

C1C0

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