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Differences What are the advantages of each

Front view of Intel Core i5 2500K

Reasons to consider the
Intel Core i5 2500K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much higher clock speed 3.3 GHz vs 1.8 GHz Around 85% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 4.98 GHz vs 1.81 GHz More than 2.8x better overclocked clock speed (Air)
Significantly higher Maximum operating temperature 72.6 °C vs 55 °C More than 30% higher Maximum operating temperature
More l3 cache per core 1.5 MB/core vs 1 MB/core 50% more l3 cache per core
Much better overclocked clock speed (Water) 4.88 GHz vs 1.8 GHz Around 2.8x better overclocked clock speed (Water)
Newer Jan, 2011 vs Aug, 2009 Release date over 1 years later
Front view of AMD Opteron 2419 EE

Reasons to consider the
AMD Opteron 2419 EE

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Much more l2 cache 3 MB vs 1 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Much lower typical power consumption 32.5W vs 112.55W 3.5x lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 9.64 $/year vs 41.29 $/year 4.3x lower annual home energy cost
More cores 6 vs 4 2 more cores; run more applications at once
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual commercial energy cost 35.04 $/year vs 110.03 $/year 3.1x lower annual commercial energy cost
More threads 6 vs 4 2 more threads

Features Key features of the Core i5 2500K  vs Opteron 2419 EE 

clock speed

Core i5 2500K
3.3 GHz
Opteron 2419 EE
1.8 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Core i5 2500K
4.98 GHz
Opteron 2419 EE
1.81 GHz

overclocked clock speed (water)

Core i5 2500K
4.88 GHz
Opteron 2419 EE
1.8 GHz

Specifications Full list of technical specs

summary

Core i5 2500K  vs
Opteron 2419 EE 
Clock speed 3.3 GHz 1.8 GHz
Cores Quad core Hexa core
Socket type
LGA 1155
F
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 40W
Annual home energy cost 41.29 $/year 9.64 $/year
Annual commercial energy cost 110.03 $/year 35.04 $/year
Typical power consumption 112.55W 32.5W

bus

Architecture DMI HyperTransport 3.0

details

Core i5 2500K  vs
Opteron 2419 EE 
Threads 4 6
L2 cache 1 MB 3 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 6 MB 6 MB
L3 cache per core 1.5 MB/core 1 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 2
Clock multiplier 33 9
Voltage range 1.2 - 1.5V 1.12 - UnknownV
Operating temperature 5 - 72.6°C 0 - 55°C

overclocking

Overclocked clock speed 4.98 GHz 1.81 GHz
Overclocked clock speed (Water) 4.88 GHz 1.8 GHz
Overclocked clock speed (Air) 4.98 GHz 1.81 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 3000 N/A
Latest DirectX 10.1 N/A
Number of displays supported 2 N/A
GPU clock speed 850 MHz N/A
Turbo clock speed 1,100 MHz N/A
3DMark06 5,275 N/A
Intel Core i5 2500K
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AMD Opteron 2419 EE
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