CPUBoss Review Our evaluation of E5520 vs 5120 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

5.2

CPUBoss Score

Combination of all six facets

Winner
Intel Xeon E5520 

CPUBoss recommends the Intel Xeon E5520  based on its performance, single-core performance and value.

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VS

Intel Xeon E5520

CPUBoss Winner
Front view of Intel Xeon E5520

Differences What are the advantages of each

Front view of Intel Xeon E5520

Reasons to consider the
Intel Xeon E5520

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Much higher clock speed 2.26 GHz vs 1.86 GHz More than 20% higher clock speed
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 8 vs 2 6 more threads
Much better overclocked clock speed (Air) 3.28 GHz vs 2.2 GHz Around 50% better overclocked clock speed (Air)
Newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Water) 4.27 GHz vs 2.2 GHz Around 95% better overclocked clock speed (Water)
Newer Mar, 2009 vs Jun, 2006 Release date over 2 years later
Front view of Intel Xeon 5120

Reasons to consider the
Intel Xeon 5120

Report a correction
Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 2 MB/core vs 0.25 MB/core 8x more l2 cache per core
Lower typical power consumption 52.81W vs 65W Around 20% lower typical power consumption
Lower annual commercial energy cost 56.94 $/year vs 70.08 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 19.27 $/year Around 20% lower annual home energy cost

Benchmarks Real world tests of Xeon E5520 vs 5120

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5520
12,384
Xeon 5120
3,487

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5520
1,701
Xeon 5120
1,011

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5520
102,200 MB/s
Xeon 5120
96.45 MB/s

PassMark Data courtesy Passmark

Xeon E5520
4,453
Xeon 5120
1,249

PassMark (Single Core)

Xeon E5520
1,024
Xeon 5120
723

Specifications Full list of technical specs

summary

Xeon E5520  vs
5120 
Clock speed 2.26 GHz 1.86 GHz
Cores Quad core Dual core
Socket type
LGA 1366
LGA 771

features

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

power consumption

TDP 80W 65W
Annual home energy cost 19.27 $/year 15.66 $/year
Annual commercial energy cost 70.08 $/year 56.94 $/year
Performance per watt 2.4 pt/W 0.95 pt/W
Typical power consumption 65W 52.81W

bus

Architecture QPI FSB
Number of links 2 1
Clock speed 2,930 MHz 1,066 MHz

details

Xeon E5520  vs
5120 
Architecture x86-64 x86-64
Threads 8 2
L2 cache 1 MB 4 MB
L2 cache per core 0.25 MB/core 2 MB/core
Manufacture process 45 nm 65 nm
Transistor count 731,000,000 291,000,000
Max CPUs 2 2
Clock multiplier 17 7
Voltage range 0.75 - 1.35V 1 - 1.5V
Operating temperature Unknown - 72°C Unknown - 65°C

overclocking

Overclocked clock speed 3.28 GHz 2.2 GHz
Overclocked clock speed (Water) 4.27 GHz 2.2 GHz
Overclocked clock speed (Air) 3.28 GHz 2.2 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
Intel Xeon E5520
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Intel Xeon 5120
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