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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 clock speed 2.9 GHz vs 2.6 GHz More than 10% higher clock speed
Significantly lower typical power consumption 52.81W vs 70.8W More than 25% lower typical power consumption
Significantly better overclocked clock speed (Air) 3 GHz vs 2.72 GHz More than 10% better overclocked clock speed (Air)
Much lower annual home energy cost 15.66 $/year vs 27.64 $/year Around 45% lower annual home energy cost
Significantly better overclocked clock speed (Water) 3.09 GHz vs 2.6 GHz Around 20% better overclocked clock speed (Water)
Lower annual commercial energy cost 56.94 $/year vs 66.84 $/year Around 15% lower annual commercial energy cost
Newer Sep, 2012 vs Apr, 2011 Release date over 1 years later
Front view of Intel Pentium G620

Reasons to consider the
Intel Pentium G620

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CPUBoss is not aware of any important advantages of the G620 vs the G645.

Benchmarks Real world tests of Pentium G645 vs G620

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 G645
143,500 MB/s
Pentium G620
128,700 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Pentium G645  vs
G620 
Clock speed 2.9 GHz 2.6 GHz
Cores Dual core Dual core
Socket type
LGA 1155

features

Has a NX bit Yes Yes
Supports trusted computing No No
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

integrated graphics

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

memory controller

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

details

Pentium G645  vs
G620 
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 nm 32 nm
Max CPUs 1 1
Clock multiplier 29 26
Operating temperature Unknown - 69.1°C Unknown - 69.1°C

overclocking

Overclock popularity 0 21
Overclocked clock speed 3 GHz 2.72 GHz
Overclocked clock speed (Water) 3.09 GHz 2.6 GHz
PassMark (Overclocked) 2,170.6 1,014.8
Overclocked clock speed (Air) 3 GHz 2.72 GHz

power consumption

TDP 65W 65W
Annual home energy cost 15.66 $/year 27.64 $/year
Annual commercial energy cost 56.94 $/year 66.84 $/year
Performance per watt 2.37 pt/W 1.64 pt/W
Typical power consumption 52.81W 70.8W

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 G620
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