CPUBoss Review Our evaluation of N2840 vs B820 among laptop 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

6.3

CPUBoss Score

Combination of all six facets

Winner
Intel Celeron B820 

CPUBoss recommends the Intel Celeron B820  based on its features.

See full details

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VS

Differences What are the advantages of each

Front view of Intel Celeron N2840

Reasons to consider the
Intel Celeron N2840

Report a correction

CPUBoss is not aware of any important advantages of the N2840 vs the B820.

Front view of Intel Celeron B820

Reasons to consider the
Intel Celeron B820

Report a correction

CPUBoss is not aware of any important advantages of the B820 vs the N2840.

Benchmarks Real world tests of Celeron N2840 vs B820

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 N2840
60,300 MB/s
Celeron B820
84,100 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Celeron N2840  vs
B820 
Clock speed 2.16 GHz 1.7 GHz
Cores Dual 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 311 MHz 650 MHz
Turbo clock speed 792 MHz 1,050 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 12,800 MB/s 21,333.32 MB/s
Maximum memory size 8,192 MB 16,384 MB

details

Celeron N2840  vs
B820 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.58 GHz 1.73 GHz
Overclocked clock speed (Water) 2.17 GHz 1.7 GHz
Overclocked clock speed (Air) 2.58 GHz 1.73 GHz

power consumption

TDP 7.5W 35W
Annual home energy cost 1.81 $/year 8.43 $/year
Performance per watt 7.08 pt/W 2.59 pt/W
Typical power consumption 6.09W 28.44W

bus

Architecture FSB DMI
Number of links 1 1
Intel Celeron N2840
Report a correction
Intel Celeron B820
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Comments

Showing 1 comment.
Personally, I have tried both processors, and I can say B820 has much better performance than N2840, you notice a smoother navigation in W8 and better fps in games. B820 is like x2 faster in general. However, N2840 has a very nice advantage: it gives you pretty much battery life, Id say like x4 more battery life than B820 (both CPUs in laptop with batteries of 6 cells and similar especifications).
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