Product comparison · 2 cpus

HP Intel Xeon E5645 vs HP Intel Xeon X5687

Add a product
  • 40specifications compared
  • 10differ
  • 30identical
  • 4known for one product only

Key differences

The HP Intel Xeon X5687 has 1.2 GHz more processor base frequency than the HP Intel Xeon E5645 (3.6 GHz vs 2.4 GHz). The HP Intel Xeon E5645 has 2 more processor cores than the HP Intel Xeon X5687 (6 vs 4). The HP Intel Xeon E5645 has 4 more processor threads than the HP Intel Xeon X5687 (12 vs 8). Only the HP Intel Xeon E5645 has embedded options available. Processor model: E5645 on the HP Intel Xeon E5645, X5687 on the HP Intel Xeon X5687.

  • Processor model
    • Intel Xeon E5645:E5645
    • Intel Xeon X5687:X5687
  • Processor base frequency
    • Intel Xeon E5645:2.4 GHz
    • Intel Xeon X5687:3.6 GHz
  • Processor cores
    • Intel Xeon E5645:6
    • Intel Xeon X5687:4
  • Processor threads
    • Intel Xeon E5645:12
    • Intel Xeon X5687:8
  • System bus rate
    • Intel Xeon E5645:5.86 GT/s
    • Intel Xeon X5687:6.4 GT/s
  • Processor boost frequency
    • Intel Xeon E5645:2.67 GHz
    • Intel Xeon X5687:3.86 GHz
  • Thermal Design Power (TDP)
    • Intel Xeon E5645:90 W
    • Intel Xeon X5687:130 W
  • VID Voltage Range
    • Intel Xeon E5645:0.75 - 1.35 V
    • Intel Xeon X5687:0.750 - 1.350 V

Side by side

Differences highlightedShow differences only (off)
Comparison of Intel Xeon E5645, Intel Xeon X5687
44 specifications
Processor8 differ
Processor familyIntel® Xeon® 5000 SequenceIntel® Xeon® 5000 Sequence
Processor modelDiffersE5645X5687
Processor base frequencyDiffers2.4 GHz3.6 GHz
Processor coresDiffers64
Processor socketSocket B (LGA 1366)Socket B (LGA 1366)
Processor lithography32 nm32 nm
Component forServer/workstationServer/workstation
Processor threadsDiffers128
System bus rateDiffers5.86 GT/s6.4 GT/s
Processor operating modes64-bit64-bit
Processor boost frequencyDiffers2.67 GHz3.86 GHz
Processor cache12 MB12 MB
Processor cache typeL3L3
Thermal Design Power (TDP)Differs90 W130 W
VID Voltage RangeDiffers0.75 - 1.35 V0.750 - 1.350 V
SteppingKnown for oneB1Unknown — not stated by the source
Bus typeQPIQPI
Number of QPI links22
Memory bandwidth supported by processor (max)32 GB/s32 GB/s
Memoryidentical
Memory types supported by processorDDR3-SDRAMDDR3-SDRAM
Memory clock speeds supported by processor800,1066,1333 MHz800,1066,1333 MHz
Memory channelsTriple-channelTriple-channel
ECCYesYes
Maximum internal memory supported by processorKnown for oneUnknown — not stated by the source288 GB
Graphicsidentical
On-board graphics cardNoNo
Features1 differ
Execute Disable BitYesYes
Idle StatesYesYes
Thermal Monitoring TechnologiesNoNo
Market segmentServerServer
Supported instruction setsSSE4.2SSE4.2
Embedded options availableDiffersYesNo
CPU configuration (max)Known for oneUnknown — not stated by the source2
Processor special featuresidentical
Enhanced Intel SpeedStep TechnologyYesYes
Intel Trusted Execution TechnologyYesYes
Intel® AES New Instructions (Intel® AES-NI)YesYes
Intel® Hyper Threading Technology (Intel® HT Technology)YesYes
Intel® Smart CacheKnown for oneYesUnknown — not stated by the source
Intel® Turbo Boost TechnologyYesYes
Intel Demand Based SwitchingYesYes
Intel VT-x with Extended Page Tables (EPT)YesYes
Intel Virtualization Technology (VT-x)YesYes
Intel Virtualization Technology for Directed I/O (VT-d)YesYes
Operational conditions1 differ
TcaseDiffers76.2 °C80.4 °C
Other featuresidentical
Intel® Virtualization Technology (Intel® VT)VT-d, VT-xVT-d, VT-x

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

More cpu comparisons

All cpu comparisons