Product comparison · 2 cpus

NEC Intel Xeon E5540 vs NEC Intel Xeon E5640

38specifications compared
10differ
28identical
10known for one product only

Key differences

Processor model
- Intel Xeon E5540:E5540
- Intel Xeon E5640:E5640
Processor base frequency
- Intel Xeon E5540:2.53 GHz
- Intel Xeon E5640:2.66 GHz
Processor lithography
- Intel Xeon E5540:45 nm
- Intel Xeon E5640:32 nm
Processor boost frequency
- Intel Xeon E5540:2.8 GHz
- Intel Xeon E5640:2.93 GHz
Processor cache
- Intel Xeon E5540:8 MB
- Intel Xeon E5640:12 MB
Stepping
- Intel Xeon E5540:D0
- Intel Xeon E5640:B1
Maximum internal memory supported by processor
- Intel Xeon E5540:144 GB
- Intel Xeon E5640:288 GB
On-board graphics card
- Intel Xeon E5540:Yes
- Intel Xeon E5640:No

Side by side

Differences highlightedShow differences only

Comparison of Intel Xeon E5540, Intel Xeon E5640
48 specifications	A NEC Intel Xeon E5540 View product	B NEC Intel Xeon E5640 View product
Processor6 differ
Processor family	Intel® Xeon® 5000 Sequence	Intel® Xeon® 5000 Sequence
Processor modelDiffers	E5540	E5640
Processor base frequencyDiffers	2.53 GHz	2.66 GHz
Processor cores	4	4
Processor socket	Socket B (LGA 1366)	Socket B (LGA 1366)
Processor lithographyDiffers	45 nm	32 nm
Component for	Server/workstation	Server/workstation
Processor threads	8	8
System bus rate	5.86 GT/s	5.86 GT/s
Processor operating modes	64-bit	64-bit
Processor boost frequencyDiffers	2.8 GHz	2.93 GHz
Processor cacheDiffers	8 MB	12 MB
Processor cache type	L3	L3
Thermal Design Power (TDP)	80 W	80 W
VID Voltage Range	0.75 - 1.35 V	0.75 - 1.35 V
SteppingDiffers	D0	B1
Bus type	QPI	QPI
Number of QPI links	2	2
Memory bandwidth supported by processor (max)	25.6 GB/s	25.6 GB/s
CPU multiplier (bus/core ratio)Known for one	19	Unknown — not stated by the source
Memory1 differ
Maximum internal memory supported by processorDiffers	144 GB	288 GB
Memory types supported by processor	DDR3-SDRAM	DDR3-SDRAM
Memory clock speeds supported by processor	800,1066 MHz	800,1066 MHz
Memory channels	Triple-channel	Triple-channel
ECC	Yes	Yes
Graphics1 differ
On-board graphics cardDiffers	Yes	No
Featuresidentical
Execute Disable Bit	Yes	Yes
Idle States	Yes	Yes
Thermal Monitoring TechnologiesKnown for one	Unknown — not stated by the source	Yes
Market segment	Server	Server
Supported instruction setsKnown for one	Unknown — not stated by the source	SSE4.2
CPU configuration (max)Known for one	Unknown — not stated by the source	2
Physical Address Extension (PAE)Known for one	Unknown — not stated by the source	Yes
Processing Die sizeKnown for one	263 mm²	Unknown — not stated by the source
Embedded options availableKnown for one	Yes	Unknown — not stated by the source
Processor special features1 differ
Enhanced Intel SpeedStep Technology	Yes	Yes
Intel Trusted Execution TechnologyDiffers	No	Yes
Intel® AES New Instructions (Intel® AES-NI)Known for one	Unknown — not stated by the source	Yes
Intel® Hyper Threading Technology (Intel® HT Technology)	Yes	Yes
Intel® Smart CacheKnown for one	Unknown — not stated by the source	Yes
Intel® Turbo Boost Technology	Yes	Yes
Intel Demand Based Switching	Yes	Yes
Intel VT-x with Extended Page Tables (EPT)	Yes	Yes
Intel Virtualization Technology (VT-x)	Yes	Yes
Intel Virtualization Technology for Directed I/O (VT-d)	Yes	Yes
Operational conditions1 differ
TcaseDiffers	76 °C	77.6 °C
Other featuresidentical
Intel® Virtualization Technology (Intel® VT)	VT-d, VT-x	VT-d, VT-x
Weight & dimensionsidentical
Package dimensions (WxDxH)Known for one	42.5 x 42.5 x 45 mm	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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