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Differences What are the advantages of each

Front view of Intel Core i5 6400

Reasons to consider the
Intel Core i5 6400

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Much newer manufacturing process 14 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher clock speed 2.7 GHz vs 2 GHz More than 35% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
More l3 cache 6 MB vs 2 MB 3x more l3 cache; more data can be stored in the l3 cache for quick access later
Much better overclocked clock speed (Air) 3.67 GHz vs 2 GHz Around 85% better overclocked clock speed (Air)
Newer Jul, 2015 vs Sep, 2007 Release date over 7 years later
Significantly more l3 cache per core 1.5 MB/core vs 0.5 MB/core 3x more l3 cache per core
Better PassMark score 6,727 vs 2,820 Around 2.5x better PassMark score
Significantly higher Maximum operating temperature 71 °C vs 55 °C Around 30% higher Maximum operating temperature
Lower typical power consumption 52.81W vs 60.94W Around 15% lower typical power consumption
Much better overclocked clock speed (Water) 4.34 GHz vs 2 GHz Around 2.2x better overclocked clock speed (Water)
Better performance per watt 2.82 pt/W vs 1.54 pt/W Around 85% better performance per watt
Lower annual commercial energy cost 56.94 $/year vs 65.7 $/year Around 15% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 18.07 $/year Around 15% lower annual home energy cost
Front view of AMD Opteron 2350

Reasons to consider the
AMD Opteron 2350

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Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration

Benchmarks Real world tests of Core i5 6400 vs Opteron 2350

PassMark Data courtesy Passmark

Specifications Full list of technical specs

summary

Core i5 6400  vs
Opteron 2350 
Clock speed 2.7 GHz 2 GHz
Cores Quad core Quad core
Is unlocked No No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 75W
Annual home energy cost 15.66 $/year 18.07 $/year
Annual commercial energy cost 56.94 $/year 65.7 $/year
Performance per watt 2.82 pt/W 1.54 pt/W
Typical power consumption 52.81W 60.94W

details

Core i5 6400  vs
Opteron 2350 
Threads 4 4
L3 cache 6 MB 2 MB
L3 cache per core 1.5 MB/core 0.5 MB/core
Manufacture process 14 nm 65 nm
Max CPUs 1 2
Operating temperature Unknown - 71°C 0 - 55°C

overclocking

Overclocked clock speed 3.67 GHz 2 GHz
Overclocked clock speed (Water) 4.34 GHz 2 GHz
Overclocked clock speed (Air) 3.67 GHz 2 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 530 N/A
Number of displays supported 3 N/A
GPU clock speed 350 MHz N/A
Turbo clock speed 950 MHz N/A
Intel Core i5 6400
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AMD Opteron 2350
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