Specifications

4COMPONENTS AND SUBSYSTEMS

ThischapterdiscussestheCPM’smajorcomponentsandsubsystems.

Processor and memory controller

TheCPMsupportsvariousversionsoftheIntelXeon5500and5600seriesprocessors.The

processorhasanintegratedmemorycontrollerandtwopoint‐to‐pointQuickpath

Interconnect(QPI)interfacesforI/OHub(IOH)andCPUconnectivity.Theprocessorcores

sharean8MBcacheandsupportSSE2,SSE3andSSE4streamingSIMD(SingleInstruction,

MultipleData)extensions.Theextensionsenhancetheperformanceofoptimized

applicationslikevideo,imageprocessing,andmediacompression.

Note:TheCPMdoesnotusetheCPU’sturboboostfeature.

TheCPUincludestheExecuteDisableBit,64‐bittechnology,IntelSpeedStep®,

virtualizationtechnologyandsimultaneousmulti‐threading.Theprocessoralsofeaturesa

loopstreamdetectorthatgreatlyincreasesloopexecutionspeed.Table 3andTable 4

providethevariousprocessorspecifications.

Adaptive thermal monitor for processor protection

TheCPUcasetemperaturemustremainwithinthespecifiedoperatingrangeinorderto

maintainreliabi lityoverthelifeoftheprocessor.TheCPUincludesanadaptivethermal

monitor(ATM)tohelpcontroltheprocessortemperature.TheATMselectsbetween

voltageandfrequencycontrol(IntelSpeedStep®)andinternalclockmodulationto

reduce

processorpowerandtoactivatethethermalcontrolcircuitry.

Table 3. CPU power specifications

Processor Core Frequency Core voltage Temp max TJ

Thermal design power

(TDP)

L5518 60W (for ATCA-4500) 2.13GHz 0.75V - 1.35V 70°C 60 W

L5638 60W (for ATCA-4550) 2.00GHz 1.0V - 1.5V 70°C 60 W

E5645 80W (for ATCA-4555) 2.40 GHz 0.75V - 1.35V 76.2°C 80 W

Table 4. CPU bus specifications

Processor Cores Threads Core frequency QPI speed DDR3 speed Cache size

L5518 60W (for ATCA-4500) 4 8 2.13GHz 5.86 GT/s 800/1066 MHz 8MB

L5638 60W (for ATCA-4550) 6 12 2.00 GHz 5.86 GT/s 800/1066/1333 MHz 12MB

E5645 80W (for ATCA-4555) 6 12 2.40 GHz 5.86 GT/s 800/1066/1333 MHz 12 MB