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Differences What are the advantages of each

Front view of Intel Celeron N2840

Reasons to consider the
Intel Celeron N2840

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CPUBoss is not aware of any important advantages of the N2840 vs the 2955U.

Front view of Intel Celeron 2955U

Reasons to consider the
Intel Celeron 2955U

Report a correction

CPUBoss is not aware of any important advantages of the 2955U vs the N2840.

Benchmarks Real world tests of Celeron N2840 vs 2955U

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Celeron N2840
1.72 mHash/s
Celeron 2955U
3.64 mHash/s

CompuBench 1.5 (Face detection)

Celeron N2840
1.11 mPixels/s
Celeron 2955U
6.28 mPixels/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Celeron N2840
0.13 fps
Celeron 2955U
0.57 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 N2840
60,300 MB/s
Celeron 2955U
93,200 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Celeron N2840  vs
2955U 
Clock speed 2.16 GHz 1.4 GHz
Cores Dual core Dual core
Is unlocked No No

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 HD (Haswell)
Number of displays supported 2 3
GPU clock speed 311 MHz 200 MHz
Turbo clock speed 792 MHz 1,000 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 16,384 MB

details

Celeron N2840  vs
2955U 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 1 MB 0.5 MB
L2 cache per core 0.5 MB/core 0.25 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.58 GHz 1.41 GHz
Overclocked clock speed (Water) 2.17 GHz 1.4 GHz
Overclocked clock speed (Air) 2.58 GHz 1.41 GHz

power consumption

TDP 7.5W 15W
Annual home energy cost 1.81 $/year 3.61 $/year
Performance per watt 7.05 pt/W 6.2 pt/W
Typical power consumption 6.09W 12.19W

bus

Architecture FSB DMI 2.0
Number of links 1 1
Intel Celeron N2840
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Intel Celeron 2955U
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Comments

Showing 1 comment.
Comparing the N2840 and the N2955U the latter is dramatically better in every benchmark, but the 2840 specifications are substantially better than the N2955U. This seems to be incongruous. The CPU Boss Review leans towards the 2955 marginally. While I agree with the CPU Boss results, it begs the question WHY? How can a celeron chip with double L-2 and L-1 cache and 50% higher clock rate (the 2840) be beat by technically inferior CPU?
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