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Differences What are the advantages of each

Front view of Intel E3940

Reasons to consider the
Intel E3940

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Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed
Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More number of displays supported 3 vs 2 1 more number of displays supported
Better geekbench 3 Multi-Core score 3,564 vs 2,624 More than 35% better geekbench 3 Multi-Core score
Newer Oct, 2016 vs Oct, 2013 Release date over 3 years later
Front view of Intel Atom E3845

Reasons to consider the
Intel Atom E3845

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Much better geekbench 3 AES single core score 317,450 MB/s vs 868.7 MB/s Around 365.5x better geekbench 3 AES single core score
Higher clock speed 1.91 GHz vs 1.6 GHz Around 20% higher clock speed
Higher GPU clock speed 542 MHz vs 400 MHz More than 35% higher GPU clock speed
Much better performance per watt 11.4 pt/W vs 6.52 pt/W Around 75% better performance per watt
Higher Maximum operating temperature 110 °C vs 100 °C 10% higher Maximum operating temperature

Benchmarks Real world tests of E3940 vs Atom E3845

GeekBench 3 (Multi-core) Data courtesy Primate Labs

E3940
3,564
Atom E3845
2,624

GeekBench 3 (Single core) Data courtesy Primate Labs

E3940
1,086

GeekBench 3 (AES single core) Data courtesy Primate Labs

E3940
868.7 MB/s
Atom E3845
317,450 MB/s

Specifications Full list of technical specs

summary

E3940  vs
Atom E3845 
Clock speed 1.6 GHz 1.91 GHz
Cores Quad core Quad core

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
AES
EM64T
Supports dynamic frequency scaling Yes No

memory controller

Memory controller Built-in Built-in
Memory type
DDR3
DDR3L-1333
Channels Quad Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 12,800 MB/s
Maximum memory size 8,192 MB 8,192 MB

details

E3940  vs
Atom E3845 
Architecture x86-64 x86-64
Threads 4 4
Manufacture process 14 nm 22 nm
Max CPUs 1 1
Operating temperature Unknown - 100°C -40 - 110°C

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 500 HD
Number of displays supported 3 2
GPU clock speed 400 MHz 542 MHz

power consumption

TDP 9.5W 10W
Annual home energy cost 2.29 $/year 2.41 $/year
Annual commercial energy cost 8.32 $/year 8.76 $/year
Performance per watt 6.52 pt/W 11.4 pt/W
Typical power consumption 7.72W 8.13W

bus

Architecture FSB FSB
Number of links 1 1
Intel E3940
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Intel Atom E3845
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