Product comparison · 2 cpus

HP Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU vs HP Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU

47specifications compared
12differ
35identical
2known for one product only

Key differences

The HP Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU has 1.5 GHz more processor base frequency than the HP Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU (3.3 GHz vs 1.8 GHz). The HP Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU has 4 more processor threads than the HP Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU (8 vs 4). The HP Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU has 1.6 GT/s more system bus rate than the HP Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU (8 GT/s vs 6.4 GT/s). Only the HP Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU has Intel® Hyper Threading Technology (Intel® HT Technology). Only the HP Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU has Intel® Turbo Boost Technology.

Processor model
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:E5-2603
- Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU:E5-2643
Processor base frequency
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:1.8 GHz
- Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU:3.3 GHz
Processor threads
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:4
- Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU:8
System bus rate
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:6.4 GT/s
- Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU:8 GT/s
Processor front side bus
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:1066 MHz
- Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU:1600 MHz
Thermal Design Power (TDP)
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:80 W
- Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU:130 W
CPU multiplier (bus/core ratio)
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:18
- Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU:35
Memory bandwidth supported by processor (max)
- Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU:34.1 GB/s
- Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU:51.2 GB/s

Side by side

Differences highlightedShow differences only

Comparison of Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU, Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU
49 specifications	A HP Z820 Xeon E5-2603 4 Core 1.80GHz 10MB cache 1066MHz 2nd CPU View product	B HP Z820 Xeon E5-2643 4 Core 3.30GHz 10MB cache 1600MHz 2nd CPU View product
Processor8 differ
Processor family	Intel® Xeon® E5 Family	Intel® Xeon® E5 Family
Processor modelDiffers	E5-2603	E5-2643
Processor base frequencyDiffers	1.8 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 threadsDiffers	4	8
System bus rateDiffers	6.4 GT/s	8 GT/s
Processor operating modes	64-bit	64-bit
Processor cache	10 MB	10 MB
Processor cache typeKnown for one	L2	Unknown — not stated by the source
Processor front side busDiffers	1066 MHz	1600 MHz
Thermal Design Power (TDP)Differs	80 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)Differs	18	35
Number of QPI links	2	2
Memory bandwidth supported by processor (max)Differs	34.1 GB/s	51.2 GB/s
Processor boost frequencyKnown for one	Unknown — not stated by the source	3.5 GHz
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 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
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	No	Yes
Intel® Turbo Boost TechnologyDiffers	No	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	70 °C	73 °C
Other featuresidentical
Intel® Virtualization Technology (Intel® VT)	VT-d, VT-x	VT-d, VT-x
Compatibility	HP Z820	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.

More cpu comparisons

All cpu comparisons