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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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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
Significantly higher clock speed 2.9 GHz vs 2.4 GHz More than 20% higher clock speed
Much lower typical power consumption 52.81W vs 85.31W Around 40% lower typical power consumption
Much higher Maximum operating temperature 69.1 °C vs 62.2 °C More than 10% higher Maximum operating temperature
Much lower annual commercial energy cost 56.94 $/year vs 91.98 $/year Around 40% lower annual commercial energy cost
Much lower annual home energy cost 15.66 $/year vs 25.29 $/year Around 40% lower annual home energy cost
Newer Sep, 2012 vs Jan, 2007 Release date over 5 years later
Front view of Intel Core2 Quad Q6600

Reasons to consider the
Intel Core2 Quad Q6600

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Much more l2 cache 8 MB vs 1 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Much more l2 cache per core 2 MB/core vs 0.5 MB/core 4x more l2 cache per core
Much better overclocked clock speed (Air) 3.52 GHz vs 3 GHz More than 15% better overclocked clock speed (Air)
Significantly better overclocked clock speed (Water) 3.6 GHz vs 3.09 GHz More than 15% better overclocked clock speed (Water)

Benchmarks Real world tests of Pentium G645 vs Core2 Quad Q6600

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
Core2 Quad Q6600
102,800 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
Core2 Quad Q6600 
Clock speed 2.9 GHz 2.4 GHz
Cores Dual core Quad core
Socket type
LGA 1155
LGA 775

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

power consumption

TDP 65W 105W
Annual home energy cost 15.66 $/year 25.29 $/year
Annual commercial energy cost 56.94 $/year 91.98 $/year
Performance per watt 2.37 pt/W 1.19 pt/W
Typical power consumption 52.81W 85.31W

details

Pentium G645  vs
Core2 Quad Q6600 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 1 MB 8 MB
L2 cache per core 0.5 MB/core 2 MB/core
Manufacture process 32 nm 65 nm
Max CPUs 1 1
Clock multiplier 29 9
Operating temperature Unknown - 69.1°C Unknown - 62.2°C

overclocking

Overclock popularity 0 278
Overclocked clock speed 3 GHz 3.52 GHz
Overclocked clock speed (Water) 3.09 GHz 3.6 GHz
Overclocked clock speed (Air) 3 GHz 3.52 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 G645
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Intel Core2 Quad Q6600
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