CPUBoss Review Our evaluation of E5620 vs E5520 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

No winner declared

Too close to call

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VS

Intel Xeon E5620

CPUBoss Winner
Front view of Intel Xeon E5620

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 more l3 cache 12 MB vs 8 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Much better performance per watt 7.59 pt/W vs 2.4 pt/W Around 3.2x better performance per watt
Much better performance per dollar 2.18 pt/$ vs 0.49 pt/$ Around 4.5x better performance per dollar
Higher clock speed 2.4 GHz vs 2.26 GHz More than 5% higher clock speed
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Higher turbo clock speed 2.66 GHz vs 2.53 GHz More than 5% higher turbo clock speed
Supports more RAM 294,912 MB vs 147,456 MB Supports 2x more RAM
Much better overclocked clock speed (Air) 3.75 GHz vs 3.28 GHz Around 15% better overclocked clock speed (Air)
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l3 cache per core 3 MB/core vs 2 MB/core 50% more l3 cache per core
Newer Mar, 2010 vs Mar, 2009 Release date 11 months later
Better overclocked clock speed (Water) 4.33 GHz vs 4.27 GHz Almost the same
Front view of Intel Xeon E5520

Reasons to consider the
Intel Xeon E5520

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CPUBoss is not aware of any important advantages of the E5520 vs the E5620.

Benchmarks Real world tests of Xeon E5620 vs E5520

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5620
14,086
Xeon E5520
12,384

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5620
1,898
Xeon E5520
1,701

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5620
1,280,000 MB/s
Xeon E5520
102,200 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5620
8,737
Xeon E5520
7,188

GeekBench (64-bit) Data courtesy Primate Labs

Xeon E5620
11,417
Xeon E5520
6,848

GeekBench

Xeon E5620
11,417
Xeon E5520
8,874

PassMark Data courtesy Passmark

Xeon E5620
4,873
Xeon E5520
4,453

PassMark (Single Core)

Xeon E5620
1,059
Xeon E5520
1,024

Specifications Full list of technical specs

summary

Xeon E5620  vs
E5520 
Clock speed 2.4 GHz 2.26 GHz
Turbo clock speed 2.66 GHz 2.53 GHz
Cores Quad core Quad core
Socket type
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 80W
Annual home energy cost 19.27 $/year 19.27 $/year
Annual commercial energy cost 70.08 $/year 70.08 $/year
Performance per watt 7.59 pt/W 2.4 pt/W
Typical power consumption 65W 65W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 25,599.99 MB/s
Maximum memory size 294,912 MB 147,456 MB

details

Xeon E5620  vs
E5520 
Architecture x86-64 x86-64
Threads 8 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 12 MB 8 MB
L3 cache per core 3 MB/core 2 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 2 2
Clock multiplier 18 17
Voltage range 0.75 - 1.35V 0.75 - 1.35V
Operating temperature Unknown - 77.6°C Unknown - 72°C

overclocking

Overclocked clock speed 3.75 GHz 3.28 GHz
Overclocked clock speed (Water) 4.33 GHz 4.27 GHz
Overclocked clock speed (Air) 3.75 GHz 3.28 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 46,928 MB/s
Transfer rate 5,860 MT/s 5,860 MT/s
Clock speed 2,930 MHz 2,930 MHz
Intel Xeon E5620
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Intel Xeon E5520
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