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Differences What are the advantages of each

Front view of Intel Core2 Quad Q9450

Reasons to consider the
Intel Core2 Quad Q9450

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Much more l2 cache 12 MB vs 0.5 MB 24x 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
Much more l2 cache per core 3 MB/core vs 0.25 MB/core 12x more l2 cache per core
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much better overclocked clock speed (Air) 3.71 GHz vs 3.42 GHz Around 10% better overclocked clock speed (Air)
Higher Maximum operating temperature 71.4 °C vs 69.1 °C Around 5% higher Maximum operating temperature
Front view of Intel Core i3 2120

Reasons to consider the
Intel Core i3 2120

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Much higher clock speed 3.3 GHz vs 2.66 GHz Around 25% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Much better overclocked clock speed (Water) 3.37 GHz vs 2.67 GHz More than 25% better overclocked clock speed (Water)
Significantly lower annual home energy cost 15.66 $/year vs 22.89 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 83.22 $/year More than 30% lower annual commercial energy cost
Newer Jan, 2011 vs Jan, 2008 Release date over 3 years later

Benchmarks Real world tests of Core2 Quad Q9450 vs Core i3 2120

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

Core2 Quad Q9450
115,000 MB/s
Core i3 2120
162,800 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

Core2 Quad Q9450  vs
Core i3 2120 
Clock speed 2.66 GHz 3.3 GHz
Cores Quad core Dual core
Socket type
LGA 775
LGA 1155

features

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

power consumption

TDP 95W 65W
Annual home energy cost 22.89 $/year 15.66 $/year
Annual commercial energy cost 83.22 $/year 56.94 $/year
Performance per watt 1.33 pt/W 2.79 pt/W
Typical power consumption 77.19W 52.81W

details

Core2 Quad Q9450  vs
Core i3 2120 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 12 MB 0.5 MB
L2 cache per core 3 MB/core 0.25 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 1
Clock multiplier 8 33
Operating temperature Unknown - 71.4°C Unknown - 69.1°C

overclocking

Overclock popularity 14 22
Overclocked clock speed 3.71 GHz 3.42 GHz
Overclocked clock speed (Water) 2.67 GHz 3.37 GHz
Overclocked clock speed (Air) 3.71 GHz 3.42 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 2000
Number of displays supported N/A 2
GPU clock speed N/A 850 MHz
Turbo clock speed N/A 1,100 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Core2 Quad Q9450
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Intel Core i3 2120
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