HP Z620 Xeon E5-2643 4C 3.30GHz 10MB vs HP Z820 Xeon E5-2643 4C 3.30GHz 10MB

Comparison of Z620 Xeon E5-2643 4C 3.30GHz 10MB, Z820 Xeon E5-2643 4C 3.30GHz 10MB

48 specifications	A HP Z620 Xeon E5-2643 4C 3.30GHz 10MBView product	B HP Z820 Xeon E5-2643 4C 3.30GHz 10MBView product
Processoridentical
Processor family	Intel® Xeon® E5 Family	Intel® Xeon® E5 Family
Processor model	E5-2643	E5-2643
Processor base frequency	3.3 GHz	3.3 GHz
Processor cores	4	4
Processor socket	LGA 2011 (Socket R)	LGA 2011 (Socket R)
Processor lithography	32 nm	32 nm
Component for	Server/workstation	Server/workstation
Processor threads	8	8
System bus rate	8 GT/s	8 GT/s
Processor operating modes	64-bit	64-bit
Processor boost frequency	3.5 GHz	3.5 GHz
Processor cache	10 MB	10 MB
Processor cache type	L3	L3
Processor front side bus	1600 MHz	1600 MHz
Thermal Design Power (TDP)	130 W	130 W
VID Voltage Range	0.6 - 1.35 V	0.6 - 1.35 V
Bus type	QPI	QPI
CPU multiplier (bus/core ratio)	35	35
Number of QPI links	2	2
Memory bandwidth supported by processor (max)	51.2 GB/s	51.2 GB/s
Memoryidentical
Maximum internal memory supported by processor	750 GB	750 GB
Memory types supported by processor	DDR3-SDRAM	DDR3-SDRAM
Memory clock speeds supported by processor	800,1066,1333,1600 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 version	3.0	3.0
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 conditionsidentical
Tcase	73 °C	73 °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.