CPUBoss Review Our evaluation of E5520 vs C2750 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

Differences What are the advantages of each

Front view of Intel Xeon E5520

Reasons to consider the
Intel Xeon E5520

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Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed
Much better overclocked clock speed (Air) 3.28 GHz vs 2.4 GHz More than 35% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.27 GHz vs 2.4 GHz Around 80% better overclocked clock speed (Water)
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Front view of Intel Atom C2750

Reasons to consider the
Intel Atom C2750

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More cores 8 vs 4 Twice as many cores; run more applications at once
Much better performance per watt 11.79 pt/W vs 2.4 pt/W Around 5x better performance per watt
Much better performance per dollar 1.38 pt/$ vs 0.49 pt/$ More than 2.8x better performance per dollar
Much higher Maximum operating temperature 97 °C vs 72 °C Around 35% higher Maximum operating temperature
Higher clock speed 2.4 GHz vs 2.26 GHz More than 5% higher clock speed
Much lower typical power consumption 16.25W vs 65W 4x lower typical power consumption
Newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower annual commercial energy cost 17.52 $/year vs 70.08 $/year 4x lower annual commercial energy cost
Much lower annual home energy cost 4.82 $/year vs 19.27 $/year 4x lower annual home energy cost
Newer Jul, 2013 vs Mar, 2009 Release date over 4 years later

Benchmarks Real world tests of Xeon E5520 vs Atom C2750

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5520
12,384
Atom C2750
6,808

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5520
1,701
Atom C2750
1,089

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5520
102,200 MB/s
Atom C2750
412,200 MB/s

PassMark Data courtesy Passmark

Xeon E5520
4,453
Atom C2750
3,344

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5520  vs
Atom C2750 
Clock speed 2.26 GHz 2.4 GHz
Turbo clock speed 2.53 GHz 2.6 GHz
Cores Quad core Octa core

features

Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
EM64T
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes No

power consumption

TDP 80W 20W
Annual home energy cost 19.27 $/year 4.82 $/year
Annual commercial energy cost 70.08 $/year 17.52 $/year
Performance per watt 2.4 pt/W 11.79 pt/W
Typical power consumption 65W 16.25W

bus

Architecture QPI FSB
Number of links 2 1

details

Xeon E5520  vs
Atom C2750 
Architecture x86-64 x86-64
Threads 8 8
Manufacture process 45 nm 22 nm
Max CPUs 2 1
Operating temperature Unknown - 72°C Unknown - 97°C

overclocking

Overclocked clock speed 3.28 GHz 2.4 GHz
Overclocked clock speed (Water) 4.27 GHz 2.4 GHz
Overclocked clock speed (Air) 3.28 GHz 2.4 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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 12,800 MB/s
Intel Xeon E5520
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Intel Atom C2750
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