Product comparison · 2 cpus

HP 639704-L21 processor vs HP 645836-L21 processor

14specifications compared
3differ
11identical
1known for one product only

Key differences

Processor model
- 639704-L21 processor:E3-1270
- 645836-L21 processor:E3-1280
Processor base frequency
- 639704-L21 processor:3.4 GHz
- 645836-L21 processor:3.5 GHz
Thermal Design Power (TDP)
- 639704-L21 processor:80 W
- 645836-L21 processor:95 W

Side by side

Differences highlightedShow differences only

Comparison of 639704-L21, 645836-L21
15 specifications	A HP 639704-L21 processor Model 639704-L21 View product	B HP 645836-L21 processor Model 645836-L21 View product
Processor3 differ
Processor family	Intel® Xeon® E3 Family	Intel® Xeon® E3 Family
Processor modelDiffers	E3-1270	E3-1280
Processor base frequencyDiffers	3.4 GHz	3.5 GHz
Processor cores	4	4
Processor socket	LGA 1155 (Socket H2)	LGA 1155 (Socket H2)
Processor lithography	32 nm	32 nm
Component for	Server/workstation	Server/workstation
Processor threads	8	8
System bus rate	5 GT/s	5 GT/s
Processor operating modes	64-bit	64-bit
Processor cache	8 MB	8 MB
Processor cache type	L3	L3
Thermal Design Power (TDP)Differs	80 W	95 W
CPU multiplier (bus/core ratio)Known for one	34	Unknown — not stated by the source
Featuresidentical
Market segment	Server	Server

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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