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Differences What are the advantages of each

Front view of Intel Core i7 4870HQ

Reasons to consider the
Intel Core i7 4870HQ

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Significantly better turbo clock speed 1,200 MHz vs 1,000 MHz 20% better turbo clock speed
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Significantly better overclocked clock speed (Air) 3.65 GHz vs 2.7 GHz More than 35% better overclocked clock speed (Air)
Front view of Intel 6870HQ

Reasons to consider the
Intel 6870HQ

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Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher clock speed 2.7 GHz vs 2.5 GHz Around 10% higher clock speed
Higher GPU clock speed 350 MHz vs 200 MHz 75% higher GPU clock speed
Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Newer Jan, 2016 vs Jul, 2014 Release date over 1 years later
Slightly better overclocked clock speed (Water) 2.7 GHz vs 2.5 GHz Around 10% better overclocked clock speed (Water)

Features Key features of the Core i7 4870HQ  vs 6870HQ 

clock speed

Core i7 4870HQ
2.5 GHz
6870HQ
2.7 GHz

turbo clock speed

Core i7 4870HQ
3.7 GHz
6870HQ
3.6 GHz

L2 cache

gpu clock speed

Core i7 4870HQ
200 MHz
6870HQ
350 MHz

overclocked clock speed (air)

Core i7 4870HQ
3.65 GHz
6870HQ
2.7 GHz

overclocked clock speed (water)

Core i7 4870HQ
2.5 GHz
6870HQ
2.7 GHz

Specifications Full list of technical specs

summary

Core i7 4870HQ  vs
6870HQ 
Clock speed 2.5 GHz 2.7 GHz
Turbo clock speed 3.7 GHz 3.6 GHz
Cores Quad core Quad core
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
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 47W 45W
Annual home energy cost 11.32 $/year 10.84 $/year
Annual commercial energy cost 41.17 $/year 39.42 $/year
Typical power consumption 38.19W 36.56W

bus

Architecture DMI 2.0 FSB
Number of links 1 1
Transfer rate 5,000 MT/s 8,000 MT/s

details

Core i7 4870HQ  vs
6870HQ 
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 6 MB 8 MB
L3 cache per core 1.5 MB/core 2 MB/core
Manufacture process 22 nm 14 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.65 GHz 2.7 GHz
Overclocked clock speed (Water) 2.5 GHz 2.7 GHz
Overclocked clock speed (Air) 3.65 GHz 2.7 GHz

integrated graphics

GPU GPU GPU
Label Intel® Iris™ Pro Graphics 5200 Intel® Iris™ Pro Graphics 580
Number of displays supported 3 3
GPU clock speed 200 MHz 350 MHz
Turbo clock speed 1,200 MHz 1,000 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR3
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 12,800 MB/s 25,600 MB/s
Maximum memory size 32,768 MB 65,536 MB
Intel Core i7 4870HQ
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Intel 6870HQ
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