Product comparison · 2 cpus

HP Z620 Xeon E5-2665 8C 2.40GHz 20MB vs HP Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU

48specifications compared
16differ
32identical
1known for one product only

Key differences

Processor model
- Z620 Xeon E5-2665 8C 2.40GHz 20MB:E5-2665
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:E5-2603
Processor base frequency
- Z620 Xeon E5-2665 8C 2.40GHz 20MB:2.4 GHz
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:1.8 GHz
Processor cores
- Z620 Xeon E5-2665 8C 2.40GHz 20MB:8
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:4
Processor threads
- Z620 Xeon E5-2665 8C 2.40GHz 20MB:16
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:4
System bus rate
- Z620 Xeon E5-2665 8C 2.40GHz 20MB:8 GT/s
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:6.4 GT/s
Processor cache
- Z620 Xeon E5-2665 8C 2.40GHz 20MB:20 MB
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:10 MB
Processor cache type
- Z620 Xeon E5-2665 8C 2.40GHz 20MB:L3
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:L2
Processor front side bus
- Z620 Xeon E5-2665 8C 2.40GHz 20MB:1600 MHz
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:1066 MHz

Side by side

Differences highlightedShow differences only

Comparison of Z620 Xeon E5-2665 8C 2.40GHz 20MB, Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU
49 specifications	A HP Z620 Xeon E5-2665 8C 2.40GHz 20MB View product	B HP Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU View product
Processor11 differ
Processor family	Intel® Xeon® E5 Family	Intel® Xeon® E5 Family
Processor modelDiffers	E5-2665	E5-2603
Processor base frequencyDiffers	2.4 GHz	1.8 GHz
Processor coresDiffers	8	4
Processor socket	LGA 2011 (Socket R)	LGA 2011 (Socket R)
Processor lithography	32 nm	32 nm
Component for	Server/workstation	Server/workstation
Processor threadsDiffers	16	4
System bus rateDiffers	8 GT/s	6.4 GT/s
Processor operating modes	64-bit	64-bit
Processor boost frequencyKnown for one	3.1 GHz	Unknown — not stated by the source
Processor cacheDiffers	20 MB	10 MB
Processor cache typeDiffers	L3	L2
Processor front side busDiffers	1600 MHz	1066 MHz
Thermal Design Power (TDP)Differs	115 W	80 W
VID Voltage Range	0.6 - 1.35 V	0.6 - 1.35 V
Bus type	QPI	QPI
CPU multiplier (bus/core ratio)Differs	31	18
Number of QPI links	2	2
Memory bandwidth supported by processor (max)Differs	51.2 GB/s	34.1 GB/s
Memory1 differ
Maximum internal memory supported by processor	750 GB	750 GB
Memory types supported by processor	DDR3-SDRAM	DDR3-SDRAM
Memory clock speeds supported by processorDiffers	800,1066,1333,1600 MHz	800,1066 MHz
Memory channels	Quad-channel	Quad-channel
ECC	Yes	Yes
Graphicsidentical
On-board graphics card	No	No
Featuresidentical
Execute Disable Bit	Yes	Yes
Idle States	Yes	Yes
Thermal Monitoring Technologies	Yes	Yes
Market segment	Server	Server
Maximum number of PCI Express lanes	40	40
PCI Express slots version	3.0	3.0
CPU configuration (max)	2	2
Embedded options available	No	No
Scalability	S2S	S2S
Processor special features2 differ
Enhanced Intel SpeedStep Technology	Yes	Yes
Intel Flex Memory Access	Yes	Yes
Intel Trusted Execution Technology	Yes	Yes
Intel® AES New Instructions (Intel® AES-NI)	Yes	Yes
Intel® Hyper Threading Technology (Intel® HT Technology)Differs	Yes	No
Intel® Turbo Boost TechnologyDiffers	Yes	No
Intel Demand Based Switching	Yes	Yes
Intel VT-x with Extended Page Tables (EPT)	Yes	Yes
Intel Virtualization Technology (VT-x)	Yes	Yes
Intel Virtualization Technology for Directed I/O (VT-d)	Yes	Yes
Intel® vPro™ Platform Eligibility	Yes	Yes
Operational conditions1 differ
TcaseDiffers	81.8 °C	70 °C
Other features1 differ
Intel® Virtualization Technology (Intel® VT)	VT-d, VT-x	VT-d, VT-x
CompatibilityDiffers	HP Z620	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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