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Differences What are the advantages of each

Front view of Intel Core i5 2557M

Reasons to consider the
Intel Core i5 2557M

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Much better performance per watt 41.27 pt/W vs 1.98 pt/W More than 20.8x better performance per watt
Much better performance per dollar 2.81 pt/$ vs 1.24 pt/$ More than 2.2x better performance per dollar
More l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much lower typical power consumption 13.81W vs 59.31W 4.3x lower typical power consumption
Much higher Maximum operating temperature 100 °C vs 72.6 °C Around 40% higher Maximum operating temperature
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual home energy cost 4.1 $/year vs 17.59 $/year 4.3x lower annual home energy cost
Much lower annual commercial energy cost 14.89 $/year vs 63.95 $/year 4.3x lower annual commercial energy cost
Newer Jun, 2011 vs Apr, 2010 Release date over 1 years later
Front view of Intel Core i3 550

Reasons to consider the
Intel Core i3 550

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Much higher clock speed 3.2 GHz vs 1.7 GHz Around 90% higher clock speed
Much higher GPU clock speed 733 MHz vs 350 MHz More than 2x higher GPU clock speed
Much better overclocked clock speed (Air) 4.54 GHz vs 2.4 GHz Around 90% better overclocked clock speed (Air)
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Better PassMark (Single core) score 1,299 vs 1,107 More than 15% better PassMark (Single core) score
Much better overclocked clock speed (Water) 3.2 GHz vs 1.7 GHz Around 90% better overclocked clock speed (Water)

Benchmarks Real world tests of Core i5 2557M vs i3 550

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i5 2557M
1,780,000 MB/s
Core i3 550
128,500 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i5 2557M  vs
i3 550 
Clock speed 1.7 GHz 3.2 GHz
Cores Dual core Dual core
Socket type
BGA 1023
LGA 1156
Is unlocked No No

features

Has a NX bit Yes Yes
Supports trusted computing Yes 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 17W 73W
Annual home energy cost 4.1 $/year 17.59 $/year
Annual commercial energy cost 14.89 $/year 63.95 $/year
Performance per watt 41.27 pt/W 1.98 pt/W
Typical power consumption 13.81W 59.31W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 5,000 MT/s 2,500 MT/s

details

Core i5 2557M  vs
i3 550 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 0.5 MB
L2 cache per core 0.5 MB/core 0.25 MB/core
L3 cache 3 MB 4 MB
L3 cache per core 1.5 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1
Clock multiplier 17 24
Operating temperature Unknown - 100°C Unknown - 72.6°C

overclocking

Overclocked clock speed 2.4 GHz 4.54 GHz
Overclocked clock speed (Water) 1.7 GHz 3.2 GHz
Overclocked clock speed (Air) 2.4 GHz 4.54 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 3000 Intel® HD Graphics
Number of displays supported 2 2
GPU clock speed 350 MHz 733 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Maximum bandwidth 21,333.32 MB/s 21,333.32 MB/s
Maximum memory size 8,202.24 MB 16,773.12 MB
Intel Core i5 2557M
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Intel Core i3 550
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