Product comparison · 2 cpus

HP Intel Core i7-640LM vs HP Intel Core i7-840QM

Key differences

Processor model
- Intel Core i7-640LM:i7-640LM
- Intel Core i7-840QM:i7-840QM
Processor base frequency
- Intel Core i7-640LM:2.13 GHz
- Intel Core i7-840QM:1.86 GHz
Processor cores
- Intel Core i7-640LM:2
- Intel Core i7-840QM:4
Processor socket
- Intel Core i7-640LM:BGA 1288
- Intel Core i7-840QM:PGA988
Processor lithography
- Intel Core i7-640LM:32 nm
- Intel Core i7-840QM:45 nm
Processor threads
- Intel Core i7-640LM:4
- Intel Core i7-840QM:8
Processor boost frequency
- Intel Core i7-640LM:2.933 GHz
- Intel Core i7-840QM:3.2 GHz
Processor cache
- Intel Core i7-640LM:4 MB
- Intel Core i7-840QM:8 MB

Differences highlightedShow differences only

Comparison of Intel Core i7-640LM, Intel Core i7-840QM
26 specifications	A HP Intel Core i7-640LM View product	B HP Intel Core i7-840QM View product
Processor11 differ
Processor family	Intel® Core™ i7	Intel® Core™ i7
Processor generation	Intel® Core™ i7	Intel® Core™ i7
Processor modelDiffers	i7-640LM	i7-840QM
Processor base frequencyDiffers	2.13 GHz	1.86 GHz
Processor coresDiffers	2	4
Processor socketDiffers	BGA 1288	PGA988
Processor lithographyDiffers	32 nm	45 nm
Package type	Tray	Tray
Component for	Laptop	Laptop
Processor threadsDiffers	4	8
System bus rate	2.5 GT/s	2.5 GT/s
Processor operating modes	64-bit	64-bit
Processor boost frequencyDiffers	2.933 GHz	3.2 GHz
Processor cacheDiffers	4 MB	8 MB
Processor cache type	L3	L3
Thermal Design Power (TDP)Differs	25 W	45 W
CPU multiplier (bus/core ratio)Differs	16	14
Memory bandwidth supported by processor (max)Differs	17.1 GB/s	21 GB/s
Memory1 differ
Maximum internal memory supported by processor	8 GB	8 GB
Memory clock speeds supported by processorDiffers	800,1066 MHz	1066,1333 MHz
Memory channels	Dual-channel	Dual-channel
ECCKnown for one	Unknown — not stated by the source	No
Featuresidentical
Market segment	Mobile	Mobile
Weight & dimensionsidentical
WidthKnown for one	Unknown — not stated by the source	37.5 mm
DepthKnown for one	Unknown — not stated by the source	37.5 mm
Other features1 differ
Temperature (max)Differs	105 °C	100 °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.