CPUBoss Review Our evaluation of QX9650 vs E7400 among desktop CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Fire Strike

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

5.7

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Duo E7400 

CPUBoss recommends the Intel Core2 Duo E7400  based on its value.

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VS

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
Higher clock speed 3 GHz vs 2.8 GHz More than 5% higher clock speed
More threads 4 vs 2 Twice as many threads
More cores 4 vs 2 Twice as many cores; run more applications at once
Better geekbench 3 Multi-Core score 5,936 vs 2,714 Around 2.2x better geekbench 3 Multi-Core score
Better geekbench 3 single core score 1,722 vs 1,481 More than 15% better geekbench 3 single core score
Better overclocked clock speed (Air) 4.21 GHz vs 3.9 GHz Around 10% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 4.4 GHz vs 4.13 GHz More than 5% better overclocked clock speed (Water)
Front view of Intel Core2 Duo E7400

Reasons to consider the
Intel Core2 Duo E7400

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Much lower typical power consumption 52.81W vs 105.63W 2x lower typical power consumption
Much higher Maximum operating temperature 74.1 °C vs 64.5 °C Around 15% higher Maximum operating temperature
Better performance per dollar 2.86 pt/$ vs 0.2 pt/$ More than 14.5x better performance per dollar
Much lower annual home energy cost 15.66 $/year vs 31.32 $/year 2x lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 113.88 $/year 2x lower annual commercial energy cost
Newer Jan, 2008 vs Nov, 2007 Release date 1 months later

Benchmarks Real world tests of Core2 QX9650 vs Duo E7400

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 QX9650
136,300 MB/s
Core2 Duo E7400
119,000 MB/s

3D Mark 11 (Physics)

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

features

Has a NX bit Yes Yes
Supports trusted computing No No
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 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 1.54 pt/W 1.76 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 nm 45 nm
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

overclocking

Overclocked clock speed 4.21 GHz 3.9 GHz
Overclocked clock speed (Water) 4.4 GHz 4.13 GHz
Overclocked clock speed (Air) 4.21 GHz 3.9 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
Intel Core2 QX9650
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Intel Core2 Duo E7400
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