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Differences What are the advantages of each

Front view of Intel Core2 QX9650

Reasons to consider the
Intel Core2 QX9650

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Much more l2 cache 12 MB vs 3 MB 4x 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 1.5 MB/core 2x more l2 cache per core
Higher clock speed 3 GHz vs 2.8 GHz More than 5% higher clock speed
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Better 3DMark11 physics score 4,140 vs 2,150 Around 95% better 3DMark11 physics score
Front view of Intel Core2 Duo E7400

Reasons to consider the
Intel Core2 Duo E7400

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Significantly lower typical power consumption 52.81W vs 105.63W 2x lower typical power consumption
Much better performance per dollar 4.55 pt/$ vs 0.7 pt/$ More than 6.5x better performance per dollar
Much higher Maximum Operating Temperature 74.1 °C vs 64.5 °C Around 15% higher Maximum Operating Temperature
Significantly lower annual commercial energy cost 56.94 $/year vs 113.88 $/year 2x lower annual commercial energy cost
Significantly lower annual home energy cost 15.66 $/year vs 31.32 $/year 2x lower annual home energy cost

Benchmarks Real world tests of Core2 QX9650 vs Duo E7400

3D Mark 11 (Physics)

Core2 QX9650 Core2 Duo E7400 @ community.futuremark.com

Specifications Full list of technical specs

summary

Core2 QX9650  vs
Duo E7400 
Clock speed 3 GHz 2.8 GHz
Cores Quad core Dual core
Socket type
LGA 775
Is hyperthreaded No No

features

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

power consumption

TDP 130W 65W
Annual home energy cost 31.32 $/year 15.66 $/year
Annual commercial energy cost 113.88 $/year 56.94 $/year
Performance per watt 4.27 pt/W 5.19 pt/W
Typical power consumption 105.63W 52.81W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 1,066 MHz

details

Core2 QX9650  vs
Duo E7400 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 12 MB 3 MB
L2 cache per core 3 MB/core 1.5 MB/core
Manufacture process 45 nms 45 nms
Transistor count 820,000,000 228,000,000
Max CPUs 1 1
Clock multiplier 9 10
Voltage range 0.85 - 1.36V 0.85 - 1.36V
Operating temperature Unknown - 64.5°C Unknown - 74.1°C

gpu

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
Intel Core2 QX9650
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Intel Core2 Duo E7400
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