Product comparison · 2 cpus

HP Intel Xeon E5645, Ref vs NEC Intel Xeon E5-2403

36specifications compared
17differ
19identical
15known for one product only

Key differences

The HP Intel Xeon E5645, Ref has 0.6 GHz more processor base frequency than the NEC Intel Xeon E5-2403 (2.4 GHz vs 1.8 GHz). The HP Intel Xeon E5645, Ref has 2 more processor cores than the NEC Intel Xeon E5-2403 (6 vs 4). The HP Intel Xeon E5645, Ref has 8 more processor threads than the NEC Intel Xeon E5-2403 (12 vs 4). Only the NEC Intel Xeon E5-2403 has thermal Monitoring Technologies. Processor family: Intel® Xeon® 5000 Sequence on the HP Intel Xeon E5645, Ref, Intel® Xeon® E5 Family on the NEC Intel Xeon E5-2403.

Processor family
- Intel Xeon E5645, Ref:Intel® Xeon® 5000 Sequence
- Intel Xeon E5-2403:Intel® Xeon® E5 Family
Processor model
- Intel Xeon E5645, Ref:E5645
- Intel Xeon E5-2403:E5-2403
Processor base frequency
- Intel Xeon E5645, Ref:2.4 GHz
- Intel Xeon E5-2403:1.8 GHz
Processor cores
- Intel Xeon E5645, Ref:6
- Intel Xeon E5-2403:4
Processor socket
- Intel Xeon E5645, Ref:Socket B (LGA 1366)
- Intel Xeon E5-2403:LGA 1356 (Socket B2)
Processor threads
- Intel Xeon E5645, Ref:12
- Intel Xeon E5-2403:4
System bus rate
- Intel Xeon E5645, Ref:5.86 GT/s
- Intel Xeon E5-2403:6.4 GT/s
Processor operating modes
- Intel Xeon E5645, Ref:32-bit, 64-bit
- Intel Xeon E5-2403:64-bit

Side by side

Differences highlightedShow differences only

Comparison of Intel Xeon E5645, Ref, Intel Xeon E5-2403
51 specifications	A HP Intel Xeon E5645, Ref View product	B NEC Intel Xeon E5-2403 View product
Processor13 differ
Processor familyDiffers	Intel® Xeon® 5000 Sequence	Intel® Xeon® E5 Family
Processor modelDiffers	E5645	E5-2403
Processor base frequencyDiffers	2.4 GHz	1.8 GHz
Processor coresDiffers	6	4
Processor socketDiffers	Socket B (LGA 1366)	LGA 1356 (Socket B2)
Processor threadsDiffers	12	4
System bus rateDiffers	5.86 GT/s	6.4 GT/s
Processor operating modesDiffers	32-bit, 64-bit	64-bit
Processor cacheDiffers	12 MB	10 MB
VID Voltage RangeDiffers	0.750 - 1.350 V	0.6 - 1.35 V
SteppingDiffers	B1	M1
Number of QPI linksDiffers	2	1
Memory bandwidth supported by processor (max)Differs	32 GB/s	25 GB/s
Processor boost frequencyKnown for one	2.67 GHz	Unknown — not stated by the source
Memory2 differ
Maximum internal memory supported by processorDiffers	288 GB	375 GB
Memory clock speeds supported by processorDiffers	800,1066,1333 MHz	800,1066 MHz
Graphicsidentical
On-board graphics card modelKnown for one	Unknown — not stated by the source	Not available
On-board graphics cardKnown for one	No	Unknown — not stated by the source
Features2 differ
Thermal Monitoring TechnologiesDiffers	No	Yes
PCI Express slots versionKnown for one	Unknown — not stated by the source	3.0
Supported instruction setsDiffers	SSE4.2	AVX
CPU configuration (max)Known for one	Unknown — not stated by the source	2
ScalabilityKnown for one	Unknown — not stated by the source	S2S
Embedded options availableKnown for one	Yes	Unknown — not stated by the source
Processor special featuresidentical
Intel Flex Memory AccessKnown for one	Unknown — not stated by the source	Yes
Intel® Smart CacheKnown for one	Unknown — not stated by the source	Yes
Intel® vPro™ Platform EligibilityKnown for one	Unknown — not stated by the source	Yes
Intel® Hyper Threading Technology (Intel® HT Technology)Known for one	Yes	Unknown — not stated by the source
Intel® Turbo Boost TechnologyKnown for one	Yes	Unknown — not stated by the source
Weight & dimensionsidentical
Processor package sizeKnown for one	Unknown — not stated by the source	45 mm
Operational conditionsidentical
TcaseKnown for one	76.2 °C	Unknown — not stated by the source
Technical detailsidentical
Compliance certificatesKnown for one	RoHS	Unknown — not stated by the source

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.

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