CPUBoss Review Our evaluation of E5520 vs E3-1270 among all CPUs

Performance

Benchmark performance using all cores
Xeon E5520
5.7
Xeon E3-1270
6.1
Core i7 3770
6.9
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance
Xeon E5520
6.0
Xeon E3-1270
8.1
Core i7 3770
8.5
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics
Xeon E5520
0.0
Xeon E3-1270
0.0
Core i7 3770
6.8
Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing
Xeon E5520
0.0
Xeon E3-1270
0.0
Core i7 3770
5.8
CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?
Xeon E5520
5.0
Xeon E3-1270
5.0
Core i7 3770
5.2
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?
Xeon E5520
n.d.
Xeon E3-1270
n.d.
Core i7 3770
6.1
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more
5.4

CPUBoss Score

Combination of all six facets
Xeon E5520
5.2
Xeon E3-1270
5.4
Core i7 3770
7.9

Winner
Intel Xeon E3-1270 

CPUBoss recommends the Intel Xeon E3-1270  based on its performance, single-core performance and value.

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VS

Intel Xeon E5520

Front view of Intel Xeon E5520
Front view of Intel Xeon E3-1270

Intel Xeon E3-1270

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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 more RAM 147,456 MB vs 32,768 MB Supports 4.5x more RAM
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much better overclocked clock speed (Water) 4.27 GHz vs 3.8 GHz More than 10% better overclocked clock speed (Water)
Front view of Intel Xeon E3-1270

Reasons to consider the
Intel Xeon E3-1270

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Much higher clock speed 3.4 GHz vs 2.26 GHz More than 50% higher clock speed
Much higher turbo clock speed 3.8 GHz vs 2.53 GHz More than 50% higher turbo clock speed
Much better PassMark score 9,832 vs 4,453 Around 2.2x better PassMark score
Much better PassMark (Single core) score 2,222 vs 1,024 Around 2.2x better PassMark (Single core) score
Much better performance per watt 10.9 pt/W vs 2.4 pt/W More than 4.5x better performance per watt
Much better performance per dollar 2.6 pt/$ vs 0.49 pt/$ More than 5.2x better performance per dollar
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly better overclocked clock speed (Air) 3.52 GHz vs 3.28 GHz More than 5% better overclocked clock speed (Air)
Newer Apr, 2011 vs Mar, 2009 Release date over 2 years later

Benchmarks Real world tests of Xeon E5520 vs E3-1270

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5520
12,384
Xeon E3-1270
5,885

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5520
1,701
Xeon E3-1270
2,670

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5520
102,200 MB/s
Xeon E3-1270
1,980,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5520
7,188
Xeon E3-1270
11,216

GeekBench (64-bit) Data courtesy Primate Labs

Xeon E5520
6,848
Xeon E3-1270
14,722

GeekBench

Xeon E5520
8,874
Xeon E3-1270
14,722

PassMark Data courtesy Passmark

Xeon E5520
4,453
Xeon E3-1270
9,832

PassMark (Single Core)

Xeon E5520
1,024
Xeon E3-1270
2,222

Specifications Full list of technical specs

summary

 Xeon E5520  vs
E3-1270 
Clock speed 2.26 GHz 3.4 GHz
Turbo clock speed 2.53 GHz 3.8 GHz
Cores Quad core Quad core
Socket type
LGA 1366
LGA 1155

features
Has a NX bit Yes Yes
Supports trusted computing No 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 80W
Annual home energy cost 19.27 $/year 19.27 $/year
Annual commercial energy cost 70.08 $/year 70.08 $/year
Performance per watt 2.4 pt/W 10.9 pt/W
Typical power consumption 65W 65W

bus
Architecture QPI DMI
Number of links 2 1
Transfer rate 5,860 MT/s 5,000 MT/s

details

 Xeon E5520  vs
E3-1270 
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 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 2 1
Clock multiplier 17 34
Operating temperature Unknown - 72°C Unknown - 69.1°C

overclocking
Overclocked clock speed 3.28 GHz 3.52 GHz
Overclocked clock speed (Water) 4.27 GHz 3.8 GHz
Overclocked clock speed (Air) 3.28 GHz 3.52 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
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 21,333.32 MB/s
Maximum memory size 147,456 MB 32,768 MB
Intel Xeon E5520
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Intel Xeon E3-1270
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