CPUBoss Review Our evaluation of G620 vs E6400


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 Pentium G620 

CPUBoss recommends the Intel Pentium G620  based on its performance, single-core performance and value.

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Intel Pentium G620

CPUBoss Winner
Front view of Intel Pentium G620

Differences What are the advantages of each

Front view of Intel Pentium G620

Reasons to consider the
Intel Pentium G620

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Much newer manufacturing process 32 nm vs 65 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
Much better 3DMark11 physics score 2,440 vs 1,480 Around 65% better 3DMark11 physics score
Higher clock speed 2.6 GHz vs 2.13 GHz More than 20% higher clock speed
Better PassMark (Single core) score 1,310 vs 797 Around 65% better PassMark (Single core) score
Newer Apr, 2011 vs Jul, 2006 Release date over 4 years later
Significantly higher Maximum operating temperature 69.1 °C vs 61.4 °C Around 15% higher Maximum operating temperature
Better performance per dollar 5.57 pt/$ vs 3.9 pt/$ Around 45% better performance per dollar
Better PassMark score 2,268 vs 1,290 More than 75% better PassMark score
Slightly better performance per watt 5.11 pt/W vs 3.4 pt/W More than 50% better performance per watt
Front view of Intel Core2 Duo E6400

Reasons to consider the
Intel Core2 Duo E6400

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More l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Lower typical power consumption 52.81W vs 70.8W More than 25% lower typical power consumption
Significantly lower annual home energy cost 15.66 $/year vs 27.64 $/year Around 45% lower annual home energy cost
Lower annual commercial energy cost 56.94 $/year vs 66.84 $/year Around 15% lower annual commercial energy cost

Benchmarks Real world tests of Pentium G620 vs Core2 Duo E6400

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

Specifications Full list of technical specs


Pentium G620  vs
Core2 Duo E6400 
Clock speed 2.6 GHz 2.13 GHz
Cores Dual core Dual core
Socket type
LGA 1155
LGA 775


Has a NX bit Yes Yes
Supports trusted computing No 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 27.64 $/year 15.66 $/year
Annual commercial energy cost 66.84 $/year 56.94 $/year
Performance per watt 5.11 pt/W 3.4 pt/W
Typical power consumption 70.8W 52.81W


Pentium G620  vs
Core2 Duo E6400 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 1 MB 2 MB
L2 cache per core 0.5 MB/core 1 MB/core
Manufacture process 32 nm 65 nm
Max CPUs 1 1
Clock multiplier 26 8
Operating temperature Unknown - 69.1°C Unknown - 61.4°C


Overclock popularity 21 15

integrated graphics

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


Architecture DMI FSB
Number of links 1 1
Intel Pentium G620
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Intel Core2 Duo E6400
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