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Differences What are the advantages of each

Front view of Intel Core i7 5557U

Reasons to consider the
Intel Core i7 5557U

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Much better performance per watt 40.03 pt/W vs 11.86 pt/W Around 3.5x better performance per watt
Much better performance per dollar 2.63 pt/$ vs 1.09 pt/$ Around 2.5x better performance per dollar
Front view of Intel Core i5 6287U

Reasons to consider the
Intel Core i5 6287U

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Better CompuBench 1.5 video composition score 21.11 fps vs 18.58 fps Around 15% better CompuBench 1.5 video composition score
Newer Jul, 2015 vs Jan, 2015 Release date 6 months later
Better overclocked clock speed (Water) 3.5 GHz vs 3.1 GHz Around 15% better overclocked clock speed (Water)

Benchmarks Real world tests of Core i7 5557U vs i5 6287U

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core i7 5557U
34.15 mHash/s
Core i5 6287U
62.04 mHash/s

CompuBench 1.5 (Face detection)

Core i7 5557U
13.19 mPixels/s
Core i5 6287U
39.13 mPixels/s

CompuBench 1.5 (Ocean surface simulation) Data courtesy CompuBench

Core i7 5557U
184.97 fps
Core i5 6287U
415.06 fps

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

CompuBench 1.5 (Video composition) Data courtesy CompuBench

Core i7 5557U
18.58 fps
Core i5 6287U
21.11 fps

Specifications Full list of technical specs

summary

Core i7 5557U  vs
i5 6287U 
Clock speed 3.1 GHz 3.1 GHz
Turbo clock speed 3.4 GHz 3.5 GHz
Cores Dual core Dual core
Is unlocked No No

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 28W 28W
Annual home energy cost 6.75 $/year 6.75 $/year
Annual commercial energy cost 24.53 $/year 24.53 $/year
Performance per watt 40.03 pt/W 11.86 pt/W
Typical power consumption 22.75W 22.75W

bus

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

details

Core i7 5557U  vs
i5 6287U 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 0.5 MB 0.5 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 4 MB 4 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 14 nm 14 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.39 GHz 3.5 GHz
Overclocked clock speed (Water) 3.1 GHz 3.5 GHz
Overclocked clock speed (Air) 3.39 GHz 3.5 GHz

integrated graphics

GPU GPU GPU
Label Intel® Iris™ Graphics 6100 Intel® Iris™ Graphics 550
Number of displays supported 3 3
GPU clock speed 300 MHz 300 MHz
Turbo clock speed 1,100 MHz 1,100 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3L-1600
DDR3
Channels Dual Channel Dual Channel
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 16,384 MB 32,768 MB
Intel Core i7 5557U
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Intel Core i5 6287U
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