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Differences What are the advantages of each

Front view of Intel Pentium G870

Reasons to consider the
Intel Pentium G870

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Significantly higher clock speed 3.1 GHz vs 2.66 GHz More than 15% higher clock speed
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 3.21 GHz vs 2.67 GHz More than 20% better overclocked clock speed (Air)
Newer Jun, 2012 vs Jan, 2009 Release date over 3 years later
Significantly better overclocked clock speed (Water) 3.1 GHz vs 2.67 GHz More than 15% better overclocked clock speed (Water)
Front view of Intel Core2 Quad Q9400S

Reasons to consider the
Intel Core2 Quad Q9400S

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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
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much more l2 cache per core 1.5 MB/core vs 0.5 MB/core 3x more l2 cache per core
Much higher Maximum operating temperature 76.3 °C vs 69.1 °C More than 10% higher Maximum operating temperature

Features Key features of the Pentium G870  vs Core2 Quad Q9400S 

clock speed

Pentium G870
3.1 GHz

L2 cache

overclocked clock speed (air)

Pentium G870
3.21 GHz

overclocked clock speed (water)

Pentium G870
3.1 GHz

Specifications Full list of technical specs

summary

Pentium G870  vs
Core2 Quad Q9400S 
Clock speed 3.1 GHz 2.66 GHz
Cores Dual core Quad 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 15.66 $/year 15.66 $/year
Annual commercial energy cost 56.94 $/year 56.94 $/year
Typical power consumption 52.81W 52.81W

details

Pentium G870  vs
Core2 Quad Q9400S 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 1 MB 6 MB
L2 cache per core 0.5 MB/core 1.5 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1
Clock multiplier 31 8
Operating temperature Unknown - 69.1°C Unknown - 76.3°C

overclocking

Overclocked clock speed 3.21 GHz 2.67 GHz
Overclocked clock speed (Water) 3.1 GHz 2.67 GHz
Overclocked clock speed (Air) 3.21 GHz 2.67 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 G870
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Intel Core2 Quad Q9400S
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