Product comparison · 2 cpus

HP Intel Xeon E5-2640 2.5GHz vs HP Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU

38specifications compared
11differ
27identical
12known for one product only

Key differences

The HP Intel Xeon E5-2640 2.5GHz has 0.1 GHz more processor base frequency than the HP Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU (2.5 GHz vs 2.4 GHz). The HP Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU has 2 more processor cores than the HP Intel Xeon E5-2640 2.5GHz (8 vs 6). The HP Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU has 4 more processor threads than the HP Intel Xeon E5-2640 2.5GHz (16 vs 12). Processor model: E5-2640 on the HP Intel Xeon E5-2640 2.5GHz, E5-2665 on the HP Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU. VID Voltage Range: 0.60 - 1.35 V on the HP Intel Xeon E5-2640 2.5GHz, 0.6 - 1.35 V on the HP Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU.

Processor model
- Intel Xeon E5-2640 2.5GHz:E5-2640
- Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU:E5-2665
Processor base frequency
- Intel Xeon E5-2640 2.5GHz:2.5 GHz
- Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU:2.4 GHz
Processor cores
- Intel Xeon E5-2640 2.5GHz:6
- Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU:8
Processor threads
- Intel Xeon E5-2640 2.5GHz:12
- Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU:16
System bus rate
- Intel Xeon E5-2640 2.5GHz:7.2 GT/s
- Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU:8 GT/s
Processor boost frequency
- Intel Xeon E5-2640 2.5GHz:3 GHz
- Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU:3.1 GHz
Thermal Design Power (TDP)
- Intel Xeon E5-2640 2.5GHz:95 W
- Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU:115 W
VID Voltage Range
- Intel Xeon E5-2640 2.5GHz:0.60 - 1.35 V
- Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU:0.6 - 1.35 V

Side by side

Differences highlightedShow differences only

Comparison of Intel Xeon E5-2640 2.5GHz, Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU
50 specifications	A HP Intel Xeon E5-2640 2.5GHz View product	B HP Z820 Xeon E5-2665 8 Core 2.40GHz 20MB cache 1600MHz 2nd CPU View product
Processor9 differ
Processor modelDiffers	E5-2640	E5-2665
Processor base frequencyDiffers	2.5 GHz	2.4 GHz
Processor coresDiffers	6	8
Component forKnown for one	Unknown — not stated by the source	Server/workstation
Processor threadsDiffers	12	16
System bus rateDiffers	7.2 GT/s	8 GT/s
Processor boost frequencyDiffers	3 GHz	3.1 GHz
Processor cacheKnown for one	Unknown — not stated by the source	20 MB
Processor cache typeKnown for one	Unknown — not stated by the source	L2
Processor front side busKnown for one	Unknown — not stated by the source	1600 MHz
Thermal Design Power (TDP)Differs	95 W	115 W
VID Voltage RangeDiffers	0.60 - 1.35 V	0.6 - 1.35 V
CPU multiplier (bus/core ratio)Known for one	Unknown — not stated by the source	31
Memory bandwidth supported by processor (max)Differs	42.6 GB/s	51.2 GB/s
Memory1 differ
Memory clock speeds supported by processorDiffers	800,1066,1333 MHz	800,1066,1333,1600 MHz
Graphicsidentical
On-board graphics cardKnown for one	Unknown — not stated by the source	No
Featuresidentical
Market segmentKnown for one	Unknown — not stated by the source	Server
Maximum number of PCI Express lanesKnown for one	Unknown — not stated by the source	40
PCI Express slots versionKnown for one	Unknown — not stated by the source	3.0
Embedded options availableKnown for one	Unknown — not stated by the source	No
Supported instruction setsKnown for one	AVX	Unknown — not stated by the source
Operational conditions1 differ
TcaseDiffers	73 °C	81.8 °C
Other featuresidentical
CompatibilityKnown for one	Unknown — not stated by the source	HP Z820

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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