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Differences What are the advantages of each

Front view of Intel Core2 Quad Q9300

Reasons to consider the
Intel Core2 Quad Q9300

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Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Front view of Intel Core2 Duo E6850

Reasons to consider the
Intel Core2 Duo E6850

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Significantly higher clock speed 3 GHz vs 2.5 GHz 20% higher clock speed
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Much better overclocked clock speed (Air) 3.94 GHz vs 3.38 GHz More than 15% better overclocked clock speed (Air)
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
Better overclocked clock speed (Water) 3.89 GHz vs 3.61 GHz Around 10% better overclocked clock speed (Water)

Benchmarks Real world tests of Core2 Quad Q9300 vs Duo E6850

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 Q9300
107,000 MB/s
Core2 Duo E6850
127,600 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Specifications Full list of technical specs

summary

Core2 Quad Q9300  vs
Duo E6850 
Clock speed 2.5 GHz 3 GHz
Cores Quad core Dual core
Socket type
LGA 775
Is unlocked No Yes

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
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 1.44 pt/W 1.91 pt/W
Typical power consumption 77.19W 52.81W

details

Core2 Quad Q9300  vs
Duo E6850 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 6 MB 4 MB
L2 cache per core 1.5 MB/core 2 MB/core
Manufacture process 45 nm 65 nm
Transistor count 456,000,000 291,000,000
Max CPUs 1 1
Clock multiplier 7 9
Voltage range 0.85 - 1.36V 0.85 - 1.5V
Operating temperature Unknown - 71.4°C Unknown - 72°C

overclocking

Overclocked clock speed 3.38 GHz 3.94 GHz
Overclocked clock speed (Water) 3.61 GHz 3.89 GHz
Overclocked clock speed (Air) 3.38 GHz 3.94 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 1,333 MHz
Intel Core2 Quad Q9300
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Intel Core2 Duo E6850
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