Product comparison · 2 cpus

HP Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU vs HP Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU

Key differences

Processor model
- Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:E5-2603
- Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:E5-2640
Processor base frequency
- Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:1.8 GHz
- Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:2.5 GHz
Processor cores
- Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:4
- Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:6
Processor threads
- Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:4
- Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:12
System bus rate
- Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:6.4 GT/s
- Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:7.2 GT/s
Processor cache
- Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:10 MB
- Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:15 MB
Processor front side bus
- Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:1066 MHz
- Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:1333 MHz
Thermal Design Power (TDP)
- Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:80 W
- Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:95 W

Differences highlightedShow differences only

Comparison of Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU, Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU
49 specifications	A HP Z620 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU View product	B HP Z820 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU View product
Processor10 differ
Processor modelDiffers	E5-2603	E5-2640
Processor base frequencyDiffers	1.8 GHz	2.5 GHz
Processor coresDiffers	4	6
Processor threadsDiffers	4	12
System bus rateDiffers	6.4 GT/s	7.2 GT/s
Processor cacheDiffers	10 MB	15 MB
Processor front side busDiffers	1066 MHz	1333 MHz
Thermal Design Power (TDP)Differs	80 W	95 W
CPU multiplier (bus/core ratio)Differs	18	30
Memory bandwidth supported by processor (max)Differs	34.1 GB/s	42.6 GB/s
Processor boost frequencyKnown for one	Unknown — not stated by the source	3 GHz
Memory1 differ
Memory clock speeds supported by processorDiffers	800,1066 MHz	800,1066,1333 MHz
Featuresidentical
Embedded options availableKnown for one	No	Unknown — not stated by the source
Processor special features2 differ
Intel® Hyper Threading Technology (Intel® HT Technology)Differs	No	Yes
Intel® Turbo Boost TechnologyDiffers	No	Yes
Intel Demand Based SwitchingKnown for one	Yes	Unknown — not stated by the source
Intel VT-x with Extended Page Tables (EPT)Known for one	Yes	Unknown — not stated by the source
Operational conditions1 differ
TcaseDiffers	70 °C	73 °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.