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Differences What are the advantages of each

Front view of Intel Core2 Quad Q9550

Reasons to consider the
Intel Core2 Quad Q9550

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Much more l2 cache 12 MB vs 1 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Higher clock speed 2.83 GHz vs 2.5 GHz Around 15% higher clock speed
Much better overclocked clock speed (Air) 3.99 GHz vs 2.5 GHz Around 60% better overclocked clock speed (Air)
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 4.03 GHz vs 2.5 GHz More than 60% better overclocked clock speed (Water)
Front view of Intel Core i5 2515E

Reasons to consider the
Intel Core i5 2515E

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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 28.44W vs 77.19W 2.7x lower typical power consumption
Much higher Maximum operating temperature 100 °C vs 71.4 °C More than 40% higher Maximum operating temperature
Better performance per watt 4.05 pt/W vs 1.51 pt/W Around 2.8x better performance per watt
Newer Feb, 2011 vs Jan, 2008 Release date over 3 years later
Much lower annual home energy cost 8.43 $/year vs 22.89 $/year 2.7x lower annual home energy cost
Much lower annual commercial energy cost 30.66 $/year vs 83.22 $/year 2.7x lower annual commercial energy cost
Slightly better performance per dollar 0.55 pt/$ vs 0.5 pt/$ More than 10% better performance per dollar

Benchmarks Real world tests of Core2 Quad Q9550 vs Core i5 2515E

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Quad Q9550  vs
Core i5 2515E 
Clock speed 2.83 GHz 2.5 GHz
Cores Quad core Dual core
Socket type
LGA 775
BGA 1023

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 35W
Annual home energy cost 22.89 $/year 8.43 $/year
Annual commercial energy cost 83.22 $/year 30.66 $/year
Performance per watt 1.51 pt/W 4.05 pt/W
Typical power consumption 77.19W 28.44W

details

Core2 Quad Q9550  vs
Core i5 2515E 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 12 MB 1 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 1
Clock multiplier 8 25
Operating temperature Unknown - 71.4°C Unknown - 100°C

overclocking

Overclocked clock speed 3.99 GHz 2.5 GHz
Overclocked clock speed (Water) 4.03 GHz 2.5 GHz
Overclocked clock speed (Air) 3.99 GHz 2.5 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 3000
Number of displays supported N/A 2
GPU clock speed N/A 650 MHz
Turbo clock speed N/A 1,100 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Core2 Quad Q9550
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Intel Core i5 2515E
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