CPUBoss Review Our evaluation of G645 vs G2020

Performance

Benchmark performance using all cores

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

Single-core Performance

Individual core benchmark performance

Passmark (Single Core)

Overclocking

How much speed can you get out of the processor?

Passmark (Overclocked), Maximum Overclocked Clock Speed (Air) and 2 more

Value

Are you paying a premium for performance?

Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Overclocking and Value

Winner
Intel Pentium G2020 

CPUBoss recommends the Intel Pentium G2020  based on its .

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VS
Front view of Intel Pentium G2020

Intel Pentium G2020

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Pentium G645

Reasons to consider the
Intel Pentium G645

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Higher GPU clock speed 850 MHz vs 650 MHz More than 30% higher GPU clock speed
Better turbo clock speed 1,100 MHz vs 1,050 MHz Around 5% better turbo clock speed
Front view of Intel Pentium G2020

Reasons to consider the
Intel Pentium G2020

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Newer manufacturing process 22 nms vs 32 nms A newer manufacturing process allows for a more powerful, yet cooler running processor
More number of displays supported 3 vs 2 1 more number of displays supported
Slightly lower typical power consumption 44.69W vs 52.81W More than 15% lower typical power consumption
Better PassMark (Overclocked) score 2,960.3 vs 2,170.6 More than 35% better PassMark (Overclocked) score
Better performance per watt 8.38 pt/W vs 6.5 pt/W Around 30% better performance per watt
Marginally newer Jan, 2013 vs Sep, 2012 Release date 4 months later
Slightly lower annual commercial energy cost 48.18 $/year vs 56.94 $/year More than 15% lower annual commercial energy cost
Slightly lower annual home energy cost 13.25 $/year vs 15.66 $/year More than 15% lower annual home energy cost

Benchmarks Real world tests of Pentium G645 vs G2020

Passmark (Single Core)

Specifications Full list of technical specs

summary

Pentium G645  vs
G2020 
Clock speed 2.9 GHz 2.9 GHz
Cores Dual core Dual core
Socket type
LGA 1155
Is hyperthreaded No No

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has vitualization support Yes Yes
Instruction-set-extensions
MMX
SSE
SSE4.2
SSE3
SSE2
Supplemental SSE3
SSE4.1
SSE4
Supports dynamic frequency scaling Yes Yes

gpu

GPU GPU GPU
Label Intel® HD Graphics Intel® HD Graphics
Number of displays supported 2 3
GPU clock speed 850 MHz 650 MHz
Turbo clock speed 1,100 MHz 1,050 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
Channels Dual Channel Dual Channel
Maximum bandwidth 17,066.66 MB/s 21,333.32 MB/s
Maximum memory size 32,768 MB 32,768 MB

details

Pentium G645  vs
G2020 
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 3 MB
L3 cache per core 1.5 MB/core 1.5 MB/core
Manufacture process 32 nms 22 nms
Max CPUs 1 1
Clock multiplier 29 29

overclocking

Overclock popularity 0 3
Overclocked clock speed 3.02 GHz 3.04 GHz
Overclocked clock speed (Water) 3.08 GHz 3.01 GHz
PassMark (Overclocked) 2,170.6 2,960.3
Overclocked clock speed (Air) 3.02 GHz 3.04 GHz

power consumption

TDP 65W 55W
Annual home energy cost 15.66 $/year 13.25 $/year
Annual commercial energy cost 56.94 $/year 48.18 $/year
Performance per watt 6.5 pt/W 8.38 pt/W
Typical power consumption 52.81W 44.69W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 5,000 MT/s 5,000 MT/s
Intel Pentium G645
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Intel Pentium G2020
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