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Differences What are the advantages of each

Front view of Intel Core i5 5250U

Reasons to consider the
Intel Core i5 5250U

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Much better performance per watt 61.56 pt/W vs 5.17 pt/W Around 12x better performance per watt
Much better performance per dollar 2.93 pt/$ vs 0.72 pt/$ More than 4x better performance per dollar
Significantly better geekbench 3 Multi-Core score 5,090 vs 2,869 More than 75% better geekbench 3 Multi-Core score
Better PassMark (Single core) score 1,446 vs 906 Around 60% better PassMark (Single core) score
Significantly better overclocked clock speed (Air) 2.6 GHz vs 1.6 GHz More than 60% 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 turbo clock speed 950 MHz vs 900 MHz More than 5% better turbo clock speed
More threads 4 vs 2 Twice as many threads
Front view of Intel 3855U

Reasons to consider the
Intel 3855U

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Newer Oct, 2015 vs Jan, 2015 Release date 9 months later

Benchmarks Real world tests of Core i5 5250U vs 3855U

GeekBench 3 (Multi-core) Data courtesy Primate Labs

3855U
2,869

GeekBench 3 (Single core) Data courtesy Primate Labs

3855U
1,758

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i5 5250U
3,470,000 MB/s
3855U
2,220 MB/s

PassMark Data courtesy Passmark

3855U
1,715

PassMark (Single Core)

3855U
906

Specifications Full list of technical specs

summary

Core i5 5250U  vs
3855U 
Clock speed 1.6 GHz 1.6 GHz
Cores Dual core Dual core

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
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 15W 15W
Annual home energy cost 3.61 $/year 3.61 $/year
Annual commercial energy cost 13.14 $/year 13.14 $/year
Performance per watt 61.56 pt/W 5.17 pt/W
Typical power consumption 12.19W 12.19W

bus

Architecture DMI 2.0 FSB
Number of links 1 1
Transfer rate 5,000 MT/s 4,000 MT/s

details

Core i5 5250U  vs
3855U 
Architecture x86-64 x86-64
Threads 4 2
L3 cache 3 MB 2 MB
L3 cache per core 1.5 MB/core 1 MB/core
Manufacture process 14 nm 14 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.6 GHz 1.6 GHz
Overclocked clock speed (Water) 1.6 GHz 1.6 GHz
Overclocked clock speed (Air) 2.6 GHz 1.6 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 6000 Intel® HD Graphics 510
Number of displays supported 3 3
GPU clock speed 300 MHz 300 MHz
Turbo clock speed 950 MHz 900 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3-1600
DDR3
LPDDR3-1600
Channels Dual Channel Dual Channel
Maximum bandwidth 25,600 MB/s 29,866.66 MB/s
Maximum memory size 16,384 MB 32,768 MB
Intel Core i5 5250U
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Intel 3855U
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