Product comparison · 2 cpus

Fujitsu Pentium 4 640 vs Fujitsu Pentium D 840

14specifications compared
5differ
9identical
1known for one product only

Key differences

The Fujitsu Pentium D 840 has 46 W more thermal Design Power (TDP) than the Fujitsu Pentium 4 640 (130 W vs 84 W). Processor family: Intel® Pentium® 4 on the Fujitsu Pentium 4 640, Intel® Pentium® D on the Fujitsu Pentium D 840. VID Voltage Range: 1.287 - 1.400 V on the Fujitsu Pentium 4 640, 1.25 - 1.4 V on the Fujitsu Pentium D 840. Stepping: R0 on the Fujitsu Pentium 4 640, B0 on the Fujitsu Pentium D 840. Processor code: SL7Z8 on the Fujitsu Pentium 4 640, SL8CM on the Fujitsu Pentium D 840.

Processor family
- Pentium 4 640:Intel® Pentium® 4
- Pentium D 840:Intel® Pentium® D
Thermal Design Power (TDP)
- Pentium 4 640:84 W
- Pentium D 840:130 W
VID Voltage Range
- Pentium 4 640:1.287 - 1.400 V
- Pentium D 840:1.25 - 1.4 V
Stepping
- Pentium 4 640:R0
- Pentium D 840:B0
Processor code
- Pentium 4 640:SL7Z8
- Pentium D 840:SL8CM

Side by side

Differences highlightedShow differences only

Comparison of Pentium 4 640, Pentium D 840
15 specifications	A Fujitsu Pentium 4 640 View product	B Fujitsu Pentium D 840 View product
Processor5 differ
Processor familyDiffers	Intel® Pentium® 4	Intel® Pentium® D
Processor base frequency	3.2 GHz	3.2 GHz
Processor coresKnown for one	Unknown — not stated by the source	2
Processor socket	LGA 775 (Socket T)	LGA 775 (Socket T)
Processor lithography	90 nm	90 nm
Package type	Box	Box
Processor cache	2 MB	2 MB
Processor cache type	L2	L2
L2 cache speed	3.2 GHz	3.2 GHz
Processor front side bus	800 MHz	800 MHz
Thermal Design Power (TDP)Differs	84 W	130 W
VID Voltage RangeDiffers	1.287 - 1.400 V	1.25 - 1.4 V
SteppingDiffers	R0	B0
CPU multiplier (bus/core ratio)	16	16
Processor codeDiffers	SL7Z8	SL8CM

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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