CPUBoss Review Our evaluation of E8400 vs 2120


Benchmark performance using all cores

PassMark, GeekBench (32-bit) and GeekBench (64-bit)

Single-core Performance

Individual core benchmark performance

PassMark (Single Core)


How much speed can you get out of the processor?

overclock popularity


Are you paying a premium for performance?

Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Overclocking and Value

Intel Core i3 2120 

CPUBoss recommends the Intel Core i3 2120  based on its .

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Front view of Intel Core i3 2120

Intel Core i3 2120

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much more l2 cache 6 MB vs 0.5 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better performance per dollar 26.13 pt/$ vs 4.72 pt/$ More than 5.5x better performance per dollar
Much more l2 cache per core 3 MB/core vs 0.25 MB/core 12x more l2 cache per core
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Higher Maximum operating temperature 72.4 °C vs 69.1 °C Around 5% higher Maximum operating temperature
Front view of Intel Core i3 2120

Reasons to consider the
Intel Core i3 2120

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Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Higher clock speed 3.3 GHz vs 3 GHz Around 10% higher clock speed
More threads 4 vs 2 Twice as many threads
Better PassMark (Single core) score 1,679 vs 1,257 Around 35% better PassMark (Single core) score
Newer Jan, 2011 vs Jan, 2008 Release date over 3 years later
Better PassMark score 3,869 vs 2,172 Around 80% better PassMark score
Better 3DMark11 physics score 3,880 vs 2,310 Around 70% better 3DMark11 physics score
Better geekbench (64-bit) score 5,421 vs 3,092 More than 75% better geekbench (64-bit) score
Better performance per watt 8.54 pt/W vs 5.63 pt/W More than 50% better performance per watt

Benchmarks Real world tests of Core2 Duo E8400 vs Core i3 2120

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs


3D Mark 11 (Physics)

PassMark Data courtesy PassMark

PassMark (Single Core) Data courtesy PassMark

Reviews Word on the street

Specifications Full list of technical specs


Core2 Duo E8400  vs
Core i3 2120 
Clock speed 3 GHz 3.3 GHz
Cores Dual core Dual core
Socket type
LGA 775
LGA 1155


Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 65W
Annual home energy cost 15.66 $/year 15.66 $/year
Annual commercial energy cost 56.94 $/year 56.94 $/year
Performance per watt 5.63 pt/W 8.54 pt/W
Typical power consumption 52.81W 52.81W


Core2 Duo E8400  vs
Core i3 2120 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 6 MB 0.5 MB
L2 cache per core 3 MB/core 0.25 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 1
Clock multiplier 9 33
Operating temperature Unknown - 72.4°C Unknown - 69.1°C


Overclock popularity 125 22
Overclock review score 4.5 1

integrated graphics

Label N/A Intel® HD Graphics 2000
Number of displays supported N/A 2
GPU clock speed N/A 850 MHz
Turbo clock speed N/A 1,100 MHz


Architecture FSB DMI
Number of links 1 1
Intel Core2 Duo E8400
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Intel Core i3 2120
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