Product comparison · 2 cpus

NEC Intel Xeon E5540 vs NEC Intel Xeon E5640

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

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 modelDiffers	E5540	E5640
Processor base frequencyDiffers	2.53 GHz	2.66 GHz
Processor lithographyDiffers	45 nm	32 nm
Processor boost frequencyDiffers	2.8 GHz	2.93 GHz
Processor cacheDiffers	8 MB	12 MB
SteppingDiffers	D0	B1
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
Graphics1 differ
On-board graphics cardDiffers	Yes	No
Featuresidentical
Thermal Monitoring TechnologiesKnown for one	Unknown — not stated by the source	Yes
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
Intel Trusted Execution TechnologyDiffers	No	Yes
Intel® AES New Instructions (Intel® AES-NI)Known for one	Unknown — not stated by the source	Yes
Intel® Smart CacheKnown for one	Unknown — not stated by the source	Yes
Operational conditions1 differ
TcaseDiffers	76 °C	77.6 °C
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.