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Differences What are the advantages of each

Front view of AMD Phenom II X2 511

Reasons to consider the
AMD Phenom II X2 511

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Significantly higher clock speed 3.4 GHz vs 2.9 GHz More than 15% higher clock speed
Newer Jan, 2011 vs Jul, 2009 Release date over 1 years later
Front view of AMD Athlon II X2 245

Reasons to consider the
AMD Athlon II X2 245

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Significantly better overclocked clock speed (Air) 3.64 GHz vs 3.4 GHz More than 5% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4 GHz vs 3.4 GHz Around 20% better overclocked clock speed (Water)

Benchmarks Real world tests of Phenom II X2 511 vs Athlon II X2 245

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

Phenom II X2 511
134,650 MB/s
Athlon II X2 245
116,550 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Phenom II X2 511  vs
Athlon II X2 245 
Clock speed 3.4 GHz 2.9 GHz
Cores Dual 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

bus

Clock speed 2,000 MHz 2,000 MHz

details

Phenom II X2 511  vs
Athlon II X2 245 
Threads 2 2
L2 cache 2 MB 2 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.4 GHz 3.64 GHz
Overclocked clock speed (Water) 3.4 GHz 4 GHz
Overclocked clock speed (Air) 3.4 GHz 3.64 GHz

power consumption

TDP 65W 65W
Annual home energy cost 15.66 $/year 15.66 $/year
Annual commercial energy cost 56.94 $/year 56.94 $/year
Performance per watt 2 pt/W 1.73 pt/W
Typical power consumption 52.81W 52.81W
AMD Phenom II X2 511
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AMD Athlon II X2 245
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