CPUBoss Review Our evaluation of G620 vs E8400 among desktop CPUs (45 to 75W)

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

5.1

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Duo E8400 

CPUBoss recommends the Intel Core2 Duo E8400  based on its overclocking.

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VS

Differences What are the advantages of each

Front view of Intel Pentium G620

Reasons to consider the
Intel Pentium G620

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Newer Apr, 2011 vs Jan, 2008 Release date over 3 years later
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 1 MB 6x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly higher clock speed 3 GHz vs 2.6 GHz More than 15% higher clock speed
Much better overclocked clock speed (Air) 4.22 GHz vs 2.72 GHz More than 55% better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Significantly lower typical power consumption 52.81W vs 70.8W More than 25% lower typical power consumption
Significantly higher Maximum operating temperature 72.4 °C vs 69.1 °C Around 5% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.23 GHz vs 2.6 GHz Around 65% better overclocked clock speed (Water)
Much 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 E8400

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

Pentium G620
128,700 MB/s
Core2 Duo E8400
128,000 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

Specifications Full list of technical specs

summary

Pentium G620  vs
Core2 Duo E8400 
Clock speed 2.6 GHz 3 GHz
Cores Dual core Dual core
Socket type
LGA 1155
LGA 775

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
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 1.64 pt/W 1.83 pt/W
Typical power consumption 70.8W 52.81W

details

Pentium G620  vs
Core2 Duo E8400 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 1 MB 6 MB
L2 cache per core 0.5 MB/core 3 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1
Clock multiplier 26 9
Operating temperature Unknown - 69.1°C Unknown - 72.4°C

overclocking

Overclock popularity 21 125
Overclock review score 5 4.5
Overclocked clock speed 2.72 GHz 4.22 GHz
Overclocked clock speed (Water) 2.6 GHz 4.23 GHz
Overclocked clock speed (Air) 2.72 GHz 4.22 GHz

integrated graphics

GPU GPU None
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

bus

Architecture DMI FSB
Number of links 1 1
Intel Pentium G620
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Intel Core2 Duo E8400
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