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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 1.55 pt/W More than 26.5x better performance per watt
Much better turbo clock speed 1,200 MHz vs 500 MHz Around 2.5x better turbo clock speed
Much better performance per dollar 2.81 pt/$ vs 0.26 pt/$ More than 10.8x better performance per dollar
Higher clock speed 1.7 GHz vs 1.06 GHz More than 60% higher clock speed
Significantly higher GPU clock speed 350 MHz vs 166 MHz More than 2x higher GPU clock speed
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much better overclocked clock speed (Air) 2.4 GHz vs 1.07 GHz More than 2.2x better overclocked clock speed (Air)
More l3 cache per core 1.5 MB/core vs 1 MB/core 50% more l3 cache per core
Better PassMark score 2,654 vs 684 Around 4x better PassMark score
More threads 4 vs 2 Twice as many threads
Newer Jun, 2011 vs Aug, 2010 Release date 10 months later
Better overclocked clock speed (Water) 1.7 GHz vs 1.07 GHz Around 60% better overclocked clock speed (Water)
Front view of Intel Celeron U3405

Reasons to consider the
Intel Celeron U3405

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CPUBoss is not aware of any important advantages of the Celeron U3405 vs the Core i5 2557M.

Benchmarks Real world tests of Core i5 2557M vs Celeron U3405

PassMark Data courtesy Passmark

Specifications Full list of technical specs

summary

Core i5 2557M  vs
Celeron U3405 
Clock speed 1.7 GHz 1.06 GHz
Cores Dual core Dual core
Socket type
BGA 1023
BGA 1288

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 18W
Annual home energy cost 4.1 $/year 4.34 $/year
Annual commercial energy cost 14.89 $/year 15.77 $/year
Performance per watt 41.27 pt/W 1.55 pt/W
Typical power consumption 13.81W 14.63W

bus

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

details

Core i5 2557M  vs
Celeron U3405 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 3 MB 2 MB
L3 cache per core 1.5 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1
Clock multiplier 17 14

overclocking

Overclocked clock speed 2.4 GHz 1.07 GHz
Overclocked clock speed (Water) 1.7 GHz 1.07 GHz
Overclocked clock speed (Air) 2.4 GHz 1.07 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 166 MHz
Turbo clock speed 1,200 MHz 500 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Dual Channel Dual Channel
Supports ECC No Yes
Maximum bandwidth 21,333.32 MB/s 17,066.66 MB/s
Maximum memory size 8,202.24 MB 8,192 MB
Intel Core i5 2557M
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Intel Celeron U3405
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