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Differences What are the advantages of each

Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much higher clock speed 3 GHz vs 2.4 GHz More than 25% higher clock speed
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 4.22 GHz vs 2.77 GHz More than 50% better overclocked clock speed (Air)
Much better performance per watt 1.83 pt/W vs 0.92 pt/W More than 2x better performance per watt
Much lower typical power consumption 52.81W vs 101.56W Around 50% lower typical power consumption
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Much higher Maximum operating temperature 72.4 °C vs 61 °C Around 20% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.23 GHz vs 2.4 GHz More than 75% better overclocked clock speed (Water)
Much lower annual home energy cost 15.66 $/year vs 30.11 $/year Around 50% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 109.5 $/year Around 50% lower annual commercial energy cost
Front view of AMD Phenom X4 9750

Reasons to consider the
AMD Phenom X4 9750

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More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads

Benchmarks Real world tests of Core2 Duo E8400 vs Phenom X4 9750

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 Duo E8400
128,000 MB/s
Phenom X4 9750
93,000 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 Duo E8400  vs
Phenom X4 9750 
Clock speed 3 GHz 2.4 GHz
Cores Dual core Quad core
Socket type
LGA 775
AM2+

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 125W
Annual home energy cost 15.66 $/year 30.11 $/year
Annual commercial energy cost 56.94 $/year 109.5 $/year
Performance per watt 1.83 pt/W 0.92 pt/W
Typical power consumption 52.81W 101.56W

details

Core2 Duo E8400  vs
Phenom X4 9750 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 6 MB 2 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 65 nm
Max CPUs 1 1
Operating temperature Unknown - 72.4°C Unknown - 61°C

overclocking

Overclock popularity 125 2
Overclocked clock speed 4.22 GHz 2.77 GHz
Overclocked clock speed (Water) 4.23 GHz 2.4 GHz
Overclocked clock speed (Air) 4.22 GHz 2.77 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

Clock speed 1,333 MHz 1,800 MHz
Intel Core2 Duo E8400
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AMD Phenom X4 9750
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