CPUBoss Review Our evaluation of 4005U vs N2940 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

8

CPUBoss Score

Combination of all six facets

Winner
Intel Core i3 4005U 

CPUBoss recommends the Intel Core i3 4005U  based on its performance, single-core performance and value.

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VS

Intel Core i3 4005U

CPUBoss Winner
Front view of Intel Core i3 4005U

Differences What are the advantages of each

Front view of Intel Core i3 4005U

Reasons to consider the
Intel Core i3 4005U

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Much better CompuBench 1.5 face detection score 12.5 mPixels/s vs 1.14 mPixels/s Around 11x better CompuBench 1.5 face detection score
Much better 3DMark06 CPU score 29.9 vs 23 Around 30% better 3DMark06 CPU score
Much better performance per watt 28.25 pt/W vs 7.82 pt/W More than 3.5x better performance per watt
Much better performance per dollar 1.54 pt/$ vs 0.55 pt/$ More than 2.8x better performance per dollar
Significantly better geekbench 3 single core score 1,628 vs 855 More than 90% better geekbench 3 single core score
More number of displays supported 3 vs 2 1 more number of displays supported
Better turbo clock speed 950 MHz vs 854 MHz More than 10% better turbo clock speed
Front view of Intel Celeron N2940

Reasons to consider the
Intel Celeron N2940

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Much more l2 cache 2 MB vs 0.5 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Higher GPU clock speed 313 MHz vs 200 MHz More than 55% higher GPU clock speed
More cores 4 vs 2 Twice as many cores; run more applications at once
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Lower typical power consumption 6.09W vs 12.19W 2x lower typical power consumption
Better overclocked clock speed (Air) 2.25 GHz vs 1.81 GHz Around 25% better overclocked clock speed (Air)
Newer Jul, 2014 vs Jul, 2013 Release date a year later
Better overclocked clock speed (Water) 2.25 GHz vs 1.7 GHz More than 30% better overclocked clock speed (Water)
Lower annual home energy cost 1.81 $/year vs 3.61 $/year 2x lower annual home energy cost
Lower annual commercial energy cost 6.57 $/year vs 13.14 $/year 2x lower annual commercial energy cost

Benchmarks Real world tests of Core i3 4005U vs Celeron N2940

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core i3 4005U
8.53 mHash/s
Celeron N2940
1.83 mHash/s

CompuBench 1.5 (Face detection)

Core i3 4005U
12.5 mPixels/s
Celeron N2940
1.14 mPixels/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Core i3 4005U
0.74 fps
Celeron N2940
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

Core i3 4005U
2,180,000 MB/s
Celeron N2940
52,800 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i3 4005U  vs
Celeron N2940 
Clock speed 1.7 GHz 1.83 GHz
Cores Dual core Quad core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 15W 7.5W
Annual home energy cost 3.61 $/year 1.81 $/year
Annual commercial energy cost 13.14 $/year 6.57 $/year
Performance per watt 28.25 pt/W 7.82 pt/W
Typical power consumption 12.19W 6.09W

bus

Architecture DMI 2.0 FSB
Number of links 1 1

details

Core i3 4005U  vs
Celeron N2940 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 0.5 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 1.81 GHz 2.25 GHz
Overclocked clock speed (Water) 1.7 GHz 2.25 GHz
Overclocked clock speed (Air) 1.81 GHz 2.25 GHz

integrated graphics

GPU GPU GPU
Label HD 4400 series Intel® HD Graphics
Number of displays supported 3 2
GPU clock speed 200 MHz 313 MHz
Turbo clock speed 950 MHz 854 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 16,384 MB 8,192 MB
Intel Core i3 4005U
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Intel Celeron N2940
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