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Differences What are the advantages of each

Front view of Intel Core i7 4900MQ

Reasons to consider the
Intel Core i7 4900MQ

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Much higher clock speed 2.8 GHz vs 1.6 GHz Around 75% higher clock speed
Much higher turbo clock speed 3.8 GHz vs 3.2 GHz Around 20% higher turbo clock speed
Much better overclocked clock speed (Air) 4.13 GHz vs 1.6 GHz More than 2.5x better overclocked clock speed (Air)
Much better turbo clock speed 1,300 MHz vs 1,000 MHz 30% better turbo clock speed
Better geekbench 3 Multi-Core score 12,748 vs 11,977 More than 5% better geekbench 3 Multi-Core score
Much better overclocked clock speed (Water) 2.8 GHz vs 1.6 GHz Around 75% better overclocked clock speed (Water)
Front view of Intel Core i7 4850EQ

Reasons to consider the
Intel Core i7 4850EQ

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Newer Jul, 2013 vs Apr, 2013 Release date 3 months later
Much higher GPU clock speed 650 MHz vs 400 MHz Around 65% higher GPU clock speed
Much better performance per dollar 5.39 pt/$ vs 1.92 pt/$ More than 2.8x better performance per dollar
Better performance per watt 53.48 pt/W vs 22.92 pt/W More than 2.2x better performance per watt

Benchmarks Real world tests of Core i7 4900MQ vs 4850EQ

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 i7 4900MQ
4,375,000 MB/s
Core i7 4850EQ
4,180,000 MB/s

Specifications Full list of technical specs

summary

Core i7 4900MQ  vs
4850EQ 
Clock speed 2.8 GHz 1.6 GHz
Turbo clock speed 3.8 GHz 3.2 GHz
Cores Quad core Quad core
Is unlocked No No

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
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 47W
Annual home energy cost 11.32 $/year 11.32 $/year
Performance per watt 22.92 pt/W 53.48 pt/W
Typical power consumption 38.19W 38.19W

bus

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

details

Core i7 4900MQ  vs
4850EQ 
Architecture x86-64 x86-64
Threads 8 8
Manufacture process 22 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.13 GHz 1.6 GHz
Overclocked clock speed (Water) 2.8 GHz 1.6 GHz
Overclocked clock speed (Air) 4.13 GHz 1.6 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 4600 Intel® Iris™ Pro graphics 5200
Number of displays supported 3 3
GPU clock speed 400 MHz 650 MHz
Turbo clock speed 1,300 MHz 1,000 MHz

memory controller

Memory controller Built-in Built-in
Channels Dual Channel Dual Channel
Supports ECC No Yes
Intel Core i7 4900MQ
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Intel Core i7 4850EQ
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