CPUBoss Review Our evaluation of 2100 vs 840 among desktop 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

Fire Strike

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?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

7.2

CPUBoss Score

Combination of all six facets

Winner
Intel Core i3 2100 

CPUBoss recommends the Intel Core i3 2100  based on its .

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VS

Differences What are the advantages of each

Front view of Intel Core i3 2100

Reasons to consider the
Intel Core i3 2100

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Front view of AMD Phenom II X4 840

Reasons to consider the
AMD Phenom II X4 840

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More cores 4 vs 2 Twice as many cores; run more applications at once

Benchmarks Real world tests of Core i3 2100 vs Phenom II X4 840

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 2100
153,100 MB/s
Phenom II X4 840
129,500 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Core i3 2100  vs Phenom II X4 840 

9.3
9.4
I was easily able to OC it to 3.7ghz on my Cooler Master V6GT on 1.35Vcore.
Phenom II X4 840

Specifications Full list of technical specs

summary

Core i3 2100  vs
Phenom II X4 840 
Clock speed 3.1 GHz 3.2 GHz
Cores Dual core Quad core
Socket type
LGA 1155
AM3
Is unlocked No No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

integrated graphics

GPU GPU None
Label Intel® HD Graphics 2000 N/A
Number of displays supported 2 N/A
GPU clock speed 850 MHz N/A
Turbo clock speed 1,100 MHz N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3

details

Core i3 2100  vs
Phenom II X4 840 
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
L3 cache 3 MB 0 MB
L3 cache per core 1.5 MB/core 0 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1
Operating temperature Unknown - 69.1°C Unknown - 71°C

overclocking

Overclock popularity 101 37
Overclock review score 4.5 5
Overclocked clock speed 3.23 GHz 3.94 GHz
Overclocked clock speed (Water) 3.23 GHz 3.2 GHz
PassMark (Overclocked) 1,518.9 1,971.6
Overclocked clock speed (Air) 3.23 GHz 3.94 GHz

power consumption

TDP 65W 95W
Annual home energy cost 37.88 $/year 22.89 $/year
Annual commercial energy cost 93.47 $/year 83.22 $/year
Performance per watt 1.41 pt/W 1.87 pt/W
Typical power consumption 98.28W 77.19W
Intel Core i3 2100
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AMD Phenom II X4 840
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Comments

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The wattage ratings in the later list are swapped.
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