CPUBoss Review Our evaluation of G2020 vs 6400K 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

7.7

CPUBoss Score

Combination of all six facets

Winner
AMD A6 6400K 

CPUBoss recommends the AMD A6 6400K  based on its overclocking and value.

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VS

Differences What are the advantages of each

Front view of Intel Pentium G2020

Reasons to consider the
Intel Pentium G2020

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Much newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l3 cache 3 MB vs None Compared to all cpus, 3 MB l3 cache is just OK
Lower typical power consumption 44.69W vs 52.81W More than 15% lower typical power consumption
Lower annual home energy cost 13.25 $/year vs 15.66 $/year More than 15% lower annual home energy cost
Lower annual commercial energy cost 48.18 $/year vs 56.94 $/year More than 15% lower annual commercial energy cost
Front view of AMD A6 6400K

Reasons to consider the
AMD A6 6400K

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Much higher clock speed 3.9 GHz vs 2.9 GHz Around 35% higher clock speed
Much better performance per dollar 10.51 pt/$ vs 3.52 pt/$ Around 3x better performance per dollar
Much better overclocked clock speed (Air) 4.79 GHz vs 3.04 GHz More than 55% better overclocked clock speed (Air)
Better geekbench 3 AES single core score 2,380,000 MB/s vs 151,400 MB/s Around 15.8x better geekbench 3 AES single core score
Better PCMark 8 home 3.0 accelerated score 2,364 vs 1,974 Around 20% better PCMark 8 home 3.0 accelerated score
Higher GPU clock speed 800 MHz vs 650 MHz Around 25% higher GPU clock speed
Better cloud gate score 3,375 vs 2,302 More than 45% better cloud gate score
Better CompuBench 1.5 bitcoin mining score 34.13 mHash/s vs 3.64 mHash/s Around 9.5x better CompuBench 1.5 bitcoin mining score
Better performance per watt 7.92 pt/W vs 4.8 pt/W More than 65% better performance per watt
Much better overclocked clock speed (Water) 5.13 GHz vs 3.1 GHz More than 65% better overclocked clock speed (Water)
Newer Jun, 2013 vs Jan, 2013 Release date 4 months later

Benchmarks Real world tests of Pentium G2020 vs A6 6400K

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Pentium G2020
3.64 mHash/s
A6 6400K
34.13 mHash/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Pentium G2020
0.48 fps
A6 6400K
0.4 fps

PCMark 8 Home 3.0 Accelerated Data courtesy FutureMark

A6 6400K
2,364

Sky Diver Data courtesy FutureMark

Cloud Gate Data courtesy FutureMark

A6 6400K
3,375

GeekBench 3 (Single core) Data courtesy Primate Labs

A6 6400K
2,108

GeekBench (32-bit) Data courtesy Primate Labs

A6 6400K
4,094

3D Mark 11 (Physics)

A6 6400K
3,710

Specifications Full list of technical specs

summary

Pentium G2020  vs
A6 6400K 
Clock speed 2.9 GHz 3.9 GHz
Cores Dual core Dual core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
SSE4
XOP
AVX
SSE3
SSE
BMI1
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
ABM
CVT16
AMD-V
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 55W 65W
Annual home energy cost 13.25 $/year 15.66 $/year
Annual commercial energy cost 48.18 $/year 56.94 $/year
Performance per watt 4.8 pt/W 7.92 pt/W
Typical power consumption 44.69W 52.81W

details

Pentium G2020  vs
A6 6400K 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 3 MB None
Manufacture process 22 nm 32 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.04 GHz 4.79 GHz
Overclocked clock speed (Water) 3.1 GHz 5.13 GHz
Overclocked clock speed (Air) 3.04 GHz 4.79 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics Radeon™ HD 8470D
GPU clock speed 650 MHz 800 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3-1333
DDR3
Intel Pentium G2020
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AMD A6 6400K
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