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Differences What are the advantages of each

Front view of Intel Celeron G1620

Reasons to consider the
Intel Celeron G1620

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Much newer manufacturing process 22 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher clock speed 2.7 GHz vs 1.8 GHz More than 50% higher clock speed
Much lower typical power consumption 44.69W vs 77.19W More than 40% lower typical power consumption
Newer Jan, 2013 vs Jan, 2005 Release date over 8 years later
Better overclocked clock speed (Air) 2.79 GHz vs 2.19 GHz Around 30% better overclocked clock speed (Air)
Much lower annual home energy cost 13.25 $/year vs 22.89 $/year More than 40% lower annual home energy cost
Much lower annual commercial energy cost 48.18 $/year vs 83.22 $/year More than 40% lower annual commercial energy cost
Significantly better overclocked clock speed (Water) 2.7 GHz vs 1.8 GHz More than 50% better overclocked clock speed (Water)
Front view of AMD Opteron 265

Reasons to consider the
AMD Opteron 265

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Much more l2 cache 2 MB vs 0.5 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration

Features Key features of the Celeron G1620  vs Opteron 265 

clock speed

Celeron G1620
2.7 GHz
Opteron 265
1.8 GHz

L2 cache

overclocked clock speed (air)

Celeron G1620
2.79 GHz
Opteron 265
2.19 GHz

overclocked clock speed (water)

Celeron G1620
2.7 GHz
Opteron 265
1.8 GHz

Specifications Full list of technical specs

summary

Celeron G1620  vs
Opteron 265 
Clock speed 2.7 GHz 1.8 GHz
Cores Dual core Dual core
Socket type
LGA 1155
940

features

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

details

Celeron G1620  vs
Opteron 265 
Threads 2 2
L2 cache 0.5 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 22 nm 90 nm
Max CPUs 1 2
Clock multiplier 27 9

overclocking

Overclocked clock speed 2.79 GHz 2.19 GHz
Overclocked clock speed (Water) 2.7 GHz 1.8 GHz
Overclocked clock speed (Air) 2.79 GHz 2.19 GHz

power consumption

TDP 55W 95W
Annual home energy cost 13.25 $/year 22.89 $/year
Annual commercial energy cost 48.18 $/year 83.22 $/year
Typical power consumption 44.69W 77.19W
Intel Celeron G1620
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AMD Opteron 265
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