CPUBoss Review Our evaluation of E5520 vs E5-2620 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

5.3

CPUBoss Score

Combination of all six facets

Winner
Intel Xeon E5-2620 

CPUBoss recommends the Intel Xeon E5-2620  based on its performance, single-core performance and value.

See full details

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VS
Front view of Intel Xeon E5-2620

Intel Xeon E5-2620

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Xeon E5520

Reasons to consider the
Intel Xeon E5520

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Significantly higher clock speed 2.26 GHz vs 2 GHz Around 15% higher clock speed
Much better overclocked clock speed (Air) 3.28 GHz vs 2.28 GHz Around 45% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.27 GHz vs 2 GHz Around 2.2x better overclocked clock speed (Water)
Lower typical power consumption 65W vs 77.19W More than 15% lower typical power consumption
Lower annual commercial energy cost 70.08 $/year vs 83.22 $/year More than 15% lower annual commercial energy cost
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 E5-2620

Reasons to consider the
Intel Xeon E5-2620

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Much more l3 cache 15 MB vs 8 MB Around 90% more l3 cache; more data can be stored in the l3 cache for quick access later
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 better PassMark score 7,957 vs 4,453 Around 80% better PassMark score
More cores 6 vs 4 2 more cores; run more applications at once
Much better performance per watt 6.57 pt/W vs 2.4 pt/W Around 2.8x better performance per watt
Much better performance per dollar 1.52 pt/$ vs 0.49 pt/$ More than 3x better performance per dollar
Supports more RAM 393,216 MB vs 147,456 MB Supports around 2.8x more RAM
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More threads 12 vs 8 4 more threads
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Newer Mar, 2012 vs Mar, 2009 Release date over 2 years later

Benchmarks Real world tests of Xeon E5520 vs E5-2620

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5520
12,384
Xeon E5-2620
10,510

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5520
1,701
Xeon E5-2620
1,736

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5520
102,200 MB/s
Xeon E5-2620
1,315,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5520
7,188
Xeon E5-2620
12,059

GeekBench (64-bit) Data courtesy Primate Labs

Xeon E5520
6,848
Xeon E5-2620
13,391

GeekBench

Xeon E5520
8,874
Xeon E5-2620
13,391

PassMark Data courtesy Passmark

Xeon E5520
4,453
Xeon E5-2620
7,957

PassMark (Single Core)

Xeon E5520
1,024
Xeon E5-2620
1,231

Specifications Full list of technical specs

summary

Xeon E5520  vs
E5-2620 
Clock speed 2.26 GHz 2 GHz
Turbo clock speed 2.53 GHz 2.5 GHz
Cores Quad core Hexa core
Socket type
LGA 1366
LGA 2011

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
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 2.4 pt/W 6.57 pt/W
Typical power consumption 65W 77.19W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 42,666.64 MB/s
Maximum memory size 147,456 MB 393,216 MB

details

Xeon E5520  vs
E5-2620 
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 8 MB 15 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 2 2
Clock multiplier 17 25
Voltage range 0.75 - 1.35V 0.6 - 1.35V
Operating temperature Unknown - 72°C Unknown - 77.4°C

overclocking

Overclocked clock speed 3.28 GHz 2.28 GHz
Overclocked clock speed (Water) 4.27 GHz 2 GHz
Overclocked clock speed (Air) 3.28 GHz 2.28 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 2
Data rate 46,928 MB/s 57,600 MB/s
Transfer rate 5,860 MT/s 7,200 MT/s
Clock speed 2,930 MHz 3,600 MHz
Intel Xeon E5520
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Intel Xeon E5-2620
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