CPUBoss Review Our evaluation of N2940 vs N2840 among all CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

No winner declared

Too close to call

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VS

Intel Celeron N2940

CPUBoss Winner
Front view of Intel Celeron N2940

Differences What are the advantages of each

Front view of Intel Celeron N2940

Reasons to consider the
Intel Celeron N2940

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Much better 3DMark06 CPU score 23 vs 12.9 Around 80% better 3DMark06 CPU score
Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
Better turbo clock speed 854 MHz vs 792 MHz Around 10% better turbo clock speed
More threads 4 vs 2 Twice as many threads
Better performance per watt 7.82 pt/W vs 7.05 pt/W More than 10% better performance per watt
Slightly better performance per dollar 0.55 pt/$ vs 0.49 pt/$ More than 10% better performance per dollar
Front view of Intel Celeron N2840

Reasons to consider the
Intel Celeron N2840

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Much better geekbench 3 AES single core score 60,300 MB/s vs 52,800 MB/s Around 15% better geekbench 3 AES single core score
Higher clock speed 2.16 GHz vs 1.83 GHz Around 20% higher clock speed
Higher turbo clock speed 2.58 GHz vs 2.25 GHz Around 15% higher turbo clock speed
Better overclocked clock speed (Air) 2.58 GHz vs 2.25 GHz Around 15% better overclocked clock speed (Air)

Benchmarks Real world tests of Celeron N2940 vs N2840

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Celeron N2940
1.83 mHash/s
Celeron N2840
1.72 mHash/s

CompuBench 1.5 (Face detection)

Celeron N2940
1.14 mPixels/s
Celeron N2840
1.11 mPixels/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Celeron N2940
0.13 fps
Celeron N2840
0.13 fps

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

Celeron N2940
52,800 MB/s
Celeron N2840
60,300 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Celeron N2940  vs
N2840 
Clock speed 1.83 GHz 2.16 GHz
Turbo clock speed 2.25 GHz 2.58 GHz
Cores Quad core Dual core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Supports dynamic frequency scaling Yes Yes

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics Intel® HD Graphics
Number of displays supported 2 2
GPU clock speed 313 MHz 311 MHz
Turbo clock speed 854 MHz 792 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 12,800 MB/s 12,800 MB/s
Maximum memory size 8,192 MB 8,192 MB

details

Celeron N2940  vs
N2840 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 2 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.25 GHz 2.58 GHz
Overclocked clock speed (Water) 2.25 GHz 2.17 GHz
Overclocked clock speed (Air) 2.25 GHz 2.58 GHz

power consumption

TDP 7.5W 7.5W
Annual home energy cost 1.81 $/year 1.81 $/year
Annual commercial energy cost 6.57 $/year 6.57 $/year
Performance per watt 7.82 pt/W 7.05 pt/W
Typical power consumption 6.09W 6.09W

bus

Architecture FSB FSB
Number of links 1 1
Intel Celeron N2940
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Intel Celeron N2840
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