Product comparison · 2 cpus

HP Intel Core 2 Duo E4400 vs HP Intel Pentium 4 640

26specifications compared
10differ
16identical
5known for one product only

Key differences

Processor family
- Intel Core 2 Duo E4400:Intel® Core™2 Duo
- Intel Pentium 4 640:Intel Pentium 4 HT
Processor model
- Intel Core 2 Duo E4400:E4400
- Intel Pentium 4 640:640
Processor base frequency
- Intel Core 2 Duo E4400:2 GHz
- Intel Pentium 4 640:3.2 GHz
Processor cores
- Intel Core 2 Duo E4400:2
- Intel Pentium 4 640:1
Processor lithography
- Intel Core 2 Duo E4400:65 nm
- Intel Pentium 4 640:90 nm
Thermal Design Power (TDP)
- Intel Core 2 Duo E4400:65 W
- Intel Pentium 4 640:84 W
VID Voltage Range
- Intel Core 2 Duo E4400:0.85 - 1.5 V
- Intel Pentium 4 640:1.200 - 1.400 V
Number of Processing Die Transistors
- Intel Core 2 Duo E4400:167 M
- Intel Pentium 4 640:169 M

Side by side

Differences highlightedShow differences only

Comparison of Intel Core 2 Duo E4400, Intel Pentium 4 640
31 specifications	A HP Intel Core 2 Duo E4400 View product	B HP Intel Pentium 4 640 View product
Processor7 differ
Processor familyDiffers	Intel® Core™2 Duo	Intel Pentium 4 HT
Processor modelDiffers	E4400	640
Processor base frequencyDiffers	2 GHz	3.2 GHz
Processor coresDiffers	2	1
Processor socket	LGA 775 (Socket T)	LGA 775 (Socket T)
Processor lithographyDiffers	65 nm	90 nm
Component forKnown for one	PC	Unknown — not stated by the source
Processor operating modes	64-bit	64-bit
Processor cache	2 MB	2 MB
Processor cache type	L2	L2
Processor front side bus	800 MHz	800 MHz
Thermal Design Power (TDP)Differs	65 W	84 W
VID Voltage RangeDiffers	0.85 - 1.5 V	1.200 - 1.400 V
FSB Parity	No	No
Graphicsidentical
On-board graphics card	No	No
Features2 differ
Execute Disable Bit	Yes	Yes
Idle States	Yes	Yes
Thermal Monitoring Technologies	Yes	Yes
Market segmentKnown for one	Desktop	Unknown — not stated by the source
Number of Processing Die TransistorsDiffers	167 M	169 M
Processing Die sizeDiffers	111 mm²	135 mm²
Embedded options available	No	No
Processor special features1 differ
Enhanced Intel SpeedStep Technology	Yes	Yes
Intel Trusted Execution Technology	No	No
Intel® AES New Instructions (Intel® AES-NI)Known for one	No	Unknown — not stated by the source
Intel® Hyper Threading Technology (Intel® HT Technology)Differs	No	Yes
Intel® Turbo Boost Technology	No	No
Intel Demand Based Switching	No	No
Other featuresidentical
Intel® Virtualization Technology (Intel® VT)	No	No
Operational conditionsidentical
TcaseKnown for one	Unknown — not stated by the source	66.6 °C
Weight & dimensionsidentical
Processor package sizeKnown for one	Unknown — not stated by the source	37.5 mm

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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