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Differences What are the advantages of each

Front view of AMD Athlon II X3 455

Reasons to consider the
AMD Athlon II X3 455

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More cores 3 vs 2 1 more cores; run more applications at once
More threads 3 vs 2 1 more threads
Significantly better overclocked clock speed (Water) 4.04 GHz vs 3.6 GHz More than 10% better overclocked clock speed (Water)
Front view of AMD Athlon II X2 280

Reasons to consider the
AMD Athlon II X2 280

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Higher clock speed 3.6 GHz vs 3.3 GHz Around 10% higher clock speed
Much better performance per watt 2.14 pt/W vs 1.11 pt/W Around 95% better performance per watt
Much lower typical power consumption 52.81W vs 113.47W 2.1x lower typical power consumption
Much better overclocked clock speed (Air) 4.33 GHz vs 3.96 GHz Around 10% better overclocked clock speed (Air)
Much lower annual home energy cost 15.66 $/year vs 39.57 $/year 2.5x 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, 2013 vs Dec, 2010 Release date over 2 years later

Benchmarks Real world tests of Athlon II X3 455 vs X2 280

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

Athlon II X3 455
132,800 MB/s
Athlon II X2 280
144,650 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Athlon II X3 455  vs
X2 280 
Clock speed 3.3 GHz 3.6 GHz
Cores Tri core Dual core

features

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

details

Athlon II X3 455  vs
X2 280 
Threads 3 2
L2 cache 2 MB 2 MB
L2 cache per core 0.67 MB/core 1 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.96 GHz 4.33 GHz
Overclocked clock speed (Water) 4.04 GHz 3.6 GHz
Overclocked clock speed (Air) 3.96 GHz 4.33 GHz

power consumption

TDP 95W 65W
Annual home energy cost 39.57 $/year 15.66 $/year
Annual commercial energy cost 113.88 $/year 56.94 $/year
Performance per watt 1.11 pt/W 2.14 pt/W
Typical power consumption 113.47W 52.81W
AMD Athlon II X3 455
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AMD Athlon II X2 280
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