Product comparison · 2 cpus

HP Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU vs HP Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU

47specifications compared
13differ
34identical
2known for one product only

Key differences

The HP Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU has 0.5 GHz more processor base frequency than the HP Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU (2.5 GHz vs 2 GHz). The HP Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU has 2 more processor cores than the HP Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU (8 vs 6). The HP Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU has 4 more processor threads than the HP Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU (16 vs 12). Processor model: E5-2640 on the HP Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU, E5-2650 on the HP Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU. Memory clock speeds supported by processor: 800,1066,1333 MHz on the HP Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU, 800,1066,1333,1600 MHz on the HP Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU.

Processor model
- Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:E5-2640
- Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU:E5-2650
Processor base frequency
- Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:2.5 GHz
- Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU:2 GHz
Processor cores
- Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:6
- Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU:8
Processor threads
- Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:12
- Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU:16
System bus rate
- Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:7.2 GT/s
- Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU:8 GT/s
Processor boost frequency
- Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:3 GHz
- Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU:2.8 GHz
Processor cache
- Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:15 MB
- Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU:20 MB
Processor front side bus
- Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU:1333 MHz
- Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU:1600 MHz

Side by side

Differences highlightedShow differences only

Comparison of Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU, Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU
49 specifications	A HP Z620 Xeon E5-2640 6 Core 2.50GHz 15MB cache 1333MHz 2nd CPU View product	B HP Z820 Xeon E5-2650 8 Core 2.00GHz 20MB cache 1600MHz 2nd CPU View product
Processor10 differ
Processor family	Intel® Xeon® E5 Family	Intel® Xeon® E5 Family
Processor modelDiffers	E5-2640	E5-2650
Processor base frequencyDiffers	2.5 GHz	2 GHz
Processor coresDiffers	6	8
Processor socket	LGA 2011 (Socket R)	LGA 2011 (Socket R)
Processor lithography	32 nm	32 nm
Component for	Server/workstation	Server/workstation
Processor threadsDiffers	12	16
System bus rateDiffers	7.2 GT/s	8 GT/s
Processor operating modes	64-bit	64-bit
Processor boost frequencyDiffers	3 GHz	2.8 GHz
Processor cacheDiffers	15 MB	20 MB
Processor front side busDiffers	1333 MHz	1600 MHz
Thermal Design Power (TDP)	95 W	95 W
VID Voltage Range	0.6 - 1.35 V	0.6 - 1.35 V
Bus type	QPI	QPI
CPU multiplier (bus/core ratio)Differs	30	28
Number of QPI links	2	2
Memory bandwidth supported by processor (max)Differs	42.6 GB/s	51.2 GB/s
Processor cache typeKnown for one	Unknown — not stated by the source	L2
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 MHz	800,1066,1333,1600 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 versionKnown for one	3.0	Unknown — not stated by the source
CPU configuration (max)	2	2
Embedded options available	No	No
Scalability	S2S	S2S
Processor special featuresidentical
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)	Yes	Yes
Intel® Turbo Boost Technology	Yes	Yes
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	73 °C	77.4 °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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