CPUBoss Review Our evaluation of L5520 vs 3770K among all CPUs

Performance

Benchmark performance using all cores
Xeon L5520
5.5
Core i7 3770K
7.4
Core i7 3770
6.9
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance
Xeon L5520
6.0
Core i7 3770K
8.5
Core i7 3770
8.5
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics
Xeon L5520
0.0
Core i7 3770K
7.2
Core i7 3770
6.8
Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing
Xeon L5520
0.0
Core i7 3770K
6.7
Core i7 3770
5.8
CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?
Xeon L5520
5.1
Core i7 3770K
5.3
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 L5520
n.d.
Core i7 3770K
6.1
Core i7 3770
6.1
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more
8.1

CPUBoss Score

Combination of all six facets
Xeon L5520
5.2
Core i7 3770K
8.1
Core i7 3770
7.9

Winner
Intel Core i7 3770K 

CPUBoss recommends the Intel Core i7 3770K  based on its performance, single-core performance and value.

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VS

Intel Xeon L5520

Front view of Intel Xeon L5520
Front view of Intel Core i7 3770K

Intel Core i7 3770K

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Differences What are the advantages of each

Front view of Intel Xeon L5520

Reasons to consider the
Intel Xeon L5520

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Much lower typical power consumption 48.75W vs 114.97W 2.4x lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 14.45 $/year vs 42.19 $/year 2.9x lower annual home energy cost
Much lower annual commercial energy cost 52.56 $/year vs 112.39 $/year 2.1x lower annual commercial energy cost
Supports more RAM 147,456 MB vs 32,768 MB Supports 4.5x more RAM
Front view of Intel Core i7 3770K

Reasons to consider the
Intel Core i7 3770K

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Much higher clock speed 3.5 GHz vs 2.26 GHz Around 55% higher clock speed
Much higher turbo clock speed 3.9 GHz vs 2.48 GHz More than 55% higher turbo clock speed
Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better performance per dollar 2.21 pt/$ vs 0.29 pt/$ Around 7.8x better performance per dollar
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better PassMark (Single core) score 2,084 vs 1,034 More than 2x better PassMark (Single core) score
Significantly better PassMark score 9,544 vs 4,387 Around 2.2x better PassMark score
Significantly better overclocked clock speed (Air) 4.69 GHz vs 3.42 GHz More than 35% better overclocked clock speed (Air)
Newer Apr, 2012 vs Mar, 2009 Release date over 3 years later
Better performance per watt 4.55 pt/W vs 2.66 pt/W More than 70% better performance per watt
Better overclocked clock speed (Water) 4.8 GHz vs 4.08 GHz Around 20% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon L5520 vs Core i7 3770K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L5520
6,798
Core i7 3770K
13,098

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon L5520
1,624
Core i7 3770K
3,304

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L5520
108,400 MB/s
Core i7 3770K
2,620,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon L5520
6,516
Core i7 3770K
13,703

GeekBench (64-bit) Data courtesy Primate Labs

Xeon L5520
7,962
Core i7 3770K
14,866

GeekBench

Xeon L5520
7,962
Core i7 3770K
17,972

PassMark Data courtesy Passmark

Xeon L5520
4,387
Core i7 3770K
9,544

PassMark (Single Core)

Xeon L5520
1,034
Core i7 3770K
2,084

Specifications Full list of technical specs

summary

 Xeon L5520  vs
Core i7 3770K 
Clock speed 2.26 GHz 3.5 GHz
Turbo clock speed 2.48 GHz 3.9 GHz
Cores Quad core Quad core
Socket type
LGA 1366
LGA 1155

features
Has a NX bit Yes Yes
Supports trusted computing No No
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 60W 77W
Annual home energy cost 14.45 $/year 42.19 $/year
Annual commercial energy cost 52.56 $/year 112.39 $/year
Performance per watt 2.66 pt/W 4.55 pt/W
Typical power consumption 48.75W 114.97W

memory controller
Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 25,599.99 MB/s 25,600 MB/s
Maximum memory size 147,456 MB 32,768 MB

details

 Xeon L5520  vs
Core i7 3770K 
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 22 nm
Transistor count 731,000,000 1,400,000,000
Max CPUs 2 1
Clock multiplier 17 35
Voltage range 0.75 - 1.35V 1.33 - 1.36V
Operating temperature Unknown - 70°C Unknown - 67.4°C

overclocking
Overclocked clock speed 3.42 GHz 4.69 GHz
Overclocked clock speed (Water) 4.08 GHz 4.8 GHz
Overclocked clock speed (Air) 3.42 GHz 4.69 GHz

integrated graphics
GPU None GPU
Label N/A Intel® HD Graphics 4000
Latest DirectX N/A 11.x
Number of displays supported N/A 3
GPU clock speed N/A 650 MHz
Turbo clock speed N/A 1,150 MHz
3DMark06 N/A 5,339.9

bus
Architecture QPI DMI
Number of links 2 1
Transfer rate 5,860 MT/s 5,000 MT/s
Intel Xeon L5520
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Intel Core i7 3770K
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