Product comparison · 2 cpus

Lenovo 42W7880 processor vs NEC Intel Xeon E5640

13specifications compared
11differ
2identical
32known for one product only

Key differences

Processor family
- 42W7880 processor:Intel® Core™2 Duo
- Intel Xeon E5640:Intel® Xeon® 5000 Sequence
Processor model
- 42W7880 processor:T8300
- Intel Xeon E5640:E5640
Processor base frequency
- 42W7880 processor:2.4 GHz
- Intel Xeon E5640:2.66 GHz
Processor cores
- 42W7880 processor:2
- Intel Xeon E5640:4
Processor socket
- 42W7880 processor:Socket 479
- Intel Xeon E5640:Socket B (LGA 1366)
Processor lithography
- 42W7880 processor:45 nm
- Intel Xeon E5640:32 nm
Component for
- 42W7880 processor:Laptop
- Intel Xeon E5640:Server/workstation
Processor cache
- 42W7880 processor:3 MB
- Intel Xeon E5640:12 MB

Side by side

Differences highlightedShow differences only

Comparison of 42W7880, Intel Xeon E5640
45 specifications	A Lenovo 42W7880 processor Model 42W7880 View product	B NEC Intel Xeon E5640 View product
Processor10 differ
Processor familyDiffers	Intel® Core™2 Duo	Intel® Xeon® 5000 Sequence
Processor modelDiffers	T8300	E5640
Processor base frequencyDiffers	2.4 GHz	2.66 GHz
Processor coresDiffers	2	4
Processor socketDiffers	Socket 479	Socket B (LGA 1366)
Processor lithographyDiffers	45 nm	32 nm
Component forDiffers	Laptop	Server/workstation
Processor threadsKnown for one	Unknown — not stated by the source	8
System bus rateKnown for one	Unknown — not stated by the source	5.86 GT/s
Processor operating modes	64-bit	64-bit
Processor boost frequencyKnown for one	Unknown — not stated by the source	2.93 GHz
Processor cacheDiffers	3 MB	12 MB
Processor cache typeDiffers	L2	L3
Thermal Design Power (TDP)Differs	35 W	80 W
VID Voltage RangeKnown for one	Unknown — not stated by the source	0.75 - 1.35 V
SteppingKnown for one	Unknown — not stated by the source	B1
Bus typeKnown for one	Unknown — not stated by the source	QPI
Number of QPI linksKnown for one	Unknown — not stated by the source	2
Memory bandwidth supported by processor (max)Known for one	Unknown — not stated by the source	25.6 GB/s
Processor front side busKnown for one	800 MHz	Unknown — not stated by the source
Memoryidentical
Maximum internal memory supported by processorKnown for one	Unknown — not stated by the source	288 GB
Memory types supported by processorKnown for one	Unknown — not stated by the source	DDR3-SDRAM
Memory clock speeds supported by processorKnown for one	Unknown — not stated by the source	800,1066 MHz
Memory channelsKnown for one	Unknown — not stated by the source	Triple-channel
ECCKnown for one	Unknown — not stated by the source	Yes
Graphicsidentical
On-board graphics card	No	No
Features1 differ
Execute Disable BitKnown for one	Unknown — not stated by the source	Yes
Idle StatesKnown for one	Unknown — not stated by the source	Yes
Thermal Monitoring TechnologiesKnown for one	Unknown — not stated by the source	Yes
Market segmentDiffers	Mobile	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
Processor special featuresidentical
Enhanced Intel SpeedStep TechnologyKnown for one	Unknown — not stated by the source	Yes
Intel Trusted Execution TechnologyKnown for one	Unknown — not stated by the source	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)Known for one	Unknown — not stated by the source	Yes
Intel® Smart CacheKnown for one	Unknown — not stated by the source	Yes
Intel® Turbo Boost TechnologyKnown for one	Unknown — not stated by the source	Yes
Intel Demand Based SwitchingKnown for one	Unknown — not stated by the source	Yes
Intel VT-x with Extended Page Tables (EPT)Known for one	Unknown — not stated by the source	Yes
Intel Virtualization Technology (VT-x)Known for one	Unknown — not stated by the source	Yes
Intel Virtualization Technology for Directed I/O (VT-d)Known for one	Unknown — not stated by the source	Yes
Operational conditionsidentical
TcaseKnown for one	Unknown — not stated by the source	77.6 °C
Other featuresidentical
Intel® Virtualization Technology (Intel® VT)Known for one	Unknown — not stated by the source	VT-d, VT-x

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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