Product comparison · 2 cpus

Dell Xeon E5540 vs Dell Xeon X5660

43specifications compared
17differ
26identical
8known for one product only

Key differences

The Dell Xeon X5660 has 0.27 GHz more processor base frequency than the Dell Xeon E5540 (2.8 GHz vs 2.53 GHz). The Dell Xeon X5660 has 2 more processor cores than the Dell Xeon E5540 (6 vs 4). The Dell Xeon E5540 has 13 nm more processor lithography than the Dell Xeon X5660 (45 nm vs 32 nm). Only the Dell Xeon E5540 has embedded options available. Only the Dell Xeon X5660 has Intel Trusted Execution Technology.

Processor model
- Xeon E5540:E5540
- Xeon X5660:X5660
Processor base frequency
- Xeon E5540:2.53 GHz
- Xeon X5660:2.8 GHz
Processor cores
- Xeon E5540:4
- Xeon X5660:6
Processor lithography
- Xeon E5540:45 nm
- Xeon X5660:32 nm
Processor threads
- Xeon E5540:8
- Xeon X5660:12
System bus rate
- Xeon E5540:5.86 GT/s
- Xeon X5660:6.4 GT/s
Processor boost frequency
- Xeon E5540:2.8 GHz
- Xeon X5660:3.2 GHz
Processor cache
- Xeon E5540:8 MB
- Xeon X5660:12 MB

Side by side

Differences highlightedShow differences only

Comparison of Xeon E5540, Xeon X5660
51 specifications	A Dell Xeon E5540 View product	B Dell Xeon X5660 View product
Processor12 differ
Processor modelDiffers	E5540	X5660
Processor base frequencyDiffers	2.53 GHz	2.8 GHz
Processor coresDiffers	4	6
Processor lithographyDiffers	45 nm	32 nm
Processor threadsDiffers	8	12
System bus rateDiffers	5.86 GT/s	6.4 GT/s
Processor boost frequencyDiffers	2.8 GHz	3.2 GHz
Processor cacheDiffers	8 MB	12 MB
L3 cache speedKnown for one	2.53 GHz	Unknown — not stated by the source
Thermal Design Power (TDP)Differs	80 W	95 W
VID Voltage RangeDiffers	0.75 - 1.35 V	0.750 - 1.350 V
SteppingKnown for one	D0	Unknown — not stated by the source
CPU multiplier (bus/core ratio)Differs	19	21
Memory bandwidth supported by processor (max)Differs	25.6 GB/s	32 GB/s
Package typeKnown for one	Unknown — not stated by the source	Tray
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
Features1 differ
Number of Processing Die TransistorsKnown for one	731 M	Unknown — not stated by the source
Processing Die sizeKnown for one	263 mm²	Unknown — not stated by the source
Embedded options availableDiffers	Yes	No
Thermal Monitoring TechnologiesKnown for one	Unknown — not stated by the source	No
Supported instruction setsKnown for one	Unknown — not stated by the source	SSE4.2
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
Operational conditions1 differ
TcaseDiffers	76 °C	81.3 °C

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