Product comparison · 2 cpus

Dell Intel Xeon E5540 vs Dell Intel Xeon E5649

Key differences

Processor model
- Intel Xeon E5540:E5540
- Intel Xeon E5649:E5649
Processor cores
- Intel Xeon E5540:4
- Intel Xeon E5649:6
Processor lithography
- Intel Xeon E5540:45 nm
- Intel Xeon E5649:32 nm
Processor threads
- Intel Xeon E5540:8
- Intel Xeon E5649:12
Processor boost frequency
- Intel Xeon E5540:2.8 GHz
- Intel Xeon E5649:2.93 GHz
Processor cache
- Intel Xeon E5540:8 MB
- Intel Xeon E5649:12 MB
Stepping
- Intel Xeon E5540:D0
- Intel Xeon E5649:B1
Memory bandwidth supported by processor (max)
- Intel Xeon E5540:25.6 GB/s
- Intel Xeon E5649:32 GB/s

Differences highlightedShow differences only

Comparison of Intel Xeon E5540, Intel Xeon E5649
46 specifications	A Dell Intel Xeon E5540 View product	B Dell Intel Xeon E5649 View product
Processor8 differ
Processor modelDiffers	E5540	E5649
Processor coresDiffers	4	6
Processor lithographyDiffers	45 nm	32 nm
Processor threadsDiffers	8	12
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
Memory bandwidth supported by processor (max)Differs	25.6 GB/s	32 GB/s
Memory2 differ
Maximum internal memory supported by processorDiffers	144 GB	288 GB
Memory clock speeds supported by processorDiffers	800,1066 MHz	800,1066,1333 MHz
Graphics1 differ
On-board graphics cardDiffers	Yes	No
Featuresidentical
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
Supported instruction setsKnown for one	Unknown — not stated by the source	SSE4.2
Physical Address Extension (PAE)Known for one	Unknown — not stated by the source	Yes
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	76.2 °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.