CPUBoss Review Our evaluation of E5620 vs E5-2420 among all CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

5.5

CPUBoss Score

Combination of all six facets

Winner
Intel Xeon E5-2420 

CPUBoss recommends the Intel Xeon E5-2420  based on its performance and single-core performance.

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VS
Front view of Intel Xeon E5-2420

Intel Xeon E5-2420

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Xeon E5620

Reasons to consider the
Intel Xeon E5620

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Much better performance per dollar 15.69 pt/$ vs 2.6 pt/$ More than 6x better performance per dollar
Higher clock speed 2.4 GHz vs 1.9 GHz More than 25% higher clock speed
Higher turbo clock speed 2.66 GHz vs 2.4 GHz More than 10% higher turbo clock speed
Significantly lower typical power consumption 65W vs 77.19W More than 15% lower typical power consumption
Much better overclocked clock speed (Air) 3.73 GHz vs 2.36 GHz Around 60% better overclocked clock speed (Air)
Significantly better performance per watt 7.6 pt/W vs 5.48 pt/W Around 40% better performance per watt
Much better overclocked clock speed (Water) 4.33 GHz vs 1.9 GHz More than 2.2x better overclocked clock speed (Water)
Significantly lower annual commercial energy cost 70.08 $/year vs 83.22 $/year More than 15% lower annual commercial energy cost
Significantly lower annual home energy cost 19.27 $/year vs 22.89 $/year More than 15% lower annual home energy cost
Front view of Intel Xeon E5-2420

Reasons to consider the
Intel Xeon E5-2420

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Much more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Newer May, 2012 vs Mar, 2010 Release date over 2 years later
Significantly better PassMark score 8,570 vs 4,873 More than 75% better PassMark score
More cores 6 vs 4 2 more cores; run more applications at once
More threads 12 vs 8 4 more threads
Better PassMark (Single core) score 1,355 vs 1,059 Around 30% better PassMark (Single core) score
Supports more RAM 393,216 MB vs 294,912 MB Supports around 35% more RAM

Benchmarks Real world tests of Xeon E5620 vs E5-2420

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5620
14,086
Xeon E5-2420
10,344

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5620
1,898
Xeon E5-2420
1,754

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5620
1,280,000 MB/s
Xeon E5-2420
985,150 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5620
8,737
Xeon E5-2420
9,662

GeekBench

Xeon E5620
11,417
Xeon E5-2420
9,662

PassMark Data courtesy Passmark

Xeon E5620
4,873
Xeon E5-2420
8,570

PassMark (Single Core)

Xeon E5620
1,059
Xeon E5-2420
1,355

Specifications Full list of technical specs

summary

Xeon E5620  vs
E5-2420 
Clock speed 2.4 GHz 1.9 GHz
Turbo clock speed 2.66 GHz 2.4 GHz
Cores Quad core Hexa core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 95W
Annual home energy cost 19.27 $/year 22.89 $/year
Annual commercial energy cost 70.08 $/year 83.22 $/year
Performance per watt 7.6 pt/W 5.48 pt/W
Typical power consumption 65W 77.19W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 31,999.98 MB/s
Maximum memory size 294,912 MB 393,216 MB

details

Xeon E5620  vs
E5-2420 
Architecture x86-64 x86-64
Threads 8 12
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.33 MB/core
L3 cache 12 MB 15 MB
L3 cache per core 3 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2
Voltage range 0.75 - 1.35V 0.6 - 1.35V

overclocking

Overclock popularity 12 0
Overclocked clock speed 3.73 GHz 2.36 GHz
Overclocked clock speed (Water) 4.33 GHz 1.9 GHz
Overclocked clock speed (Air) 3.73 GHz 2.36 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture QPI QPI
Number of links 2 1
Data rate 46,928 MB/s 28,800 MB/s
Transfer rate 5,860 MT/s 7,200 MT/s
Clock speed 2,930 MHz 3,600 MHz
Intel Xeon E5620
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Intel Xeon E5-2420
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