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Differences What are the advantages of each

Front view of AMD Opteron 865

Reasons to consider the
AMD Opteron 865

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Supports more CPUs in SMP configuration 8 vs 1 7 supports more CPUs in SMP configuration
Front view of AMD Athlon X4 740

Reasons to consider the
AMD Athlon X4 740

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Much newer manufacturing process 32 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache 4 MB vs 2 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3.2 GHz vs 1.8 GHz Around 80% higher clock speed
Much better performance per watt 12.36 pt/W vs 0.67 pt/W Around 18.5x better performance per watt
Much better overclocked clock speed (Air) 4.21 GHz vs 1.8 GHz More than 2.2x better overclocked clock speed (Air)
Significantly lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Significantly better geekbench 3 single core score 1,812 vs 689.5 Around 2.8x better geekbench 3 single core score
Newer Oct, 2012 vs Apr, 2005 Release date over 7 years later
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Higher Maximum operating temperature 73 °C vs 67 °C Around 10% higher Maximum operating temperature
Significantly better overclocked clock speed (Water) 3 GHz vs 1.8 GHz More than 65% better overclocked clock speed (Water)
Significantly lower annual home energy cost 15.66 $/year vs 22.89 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 83.22 $/year More than 30% lower annual commercial energy cost

Benchmarks Real world tests of Opteron 865 vs Athlon X4 740

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

Opteron 865
44.55 MB/s
Athlon X4 740
2,030,000 MB/s

Specifications Full list of technical specs

summary

Opteron 865  vs
Athlon X4 740 
Clock speed 1.8 GHz 3.2 GHz
Cores Dual core Quad core

features

Has a NX bit Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
SSE3
SSE
CLMUL
AMD64
SSE4.1
FMA4
SSE4.2
CVT16
AMD-V
3DNow!
AES
Supports dynamic frequency scaling Yes Yes

details

Opteron 865  vs
Athlon X4 740 
Threads 2 4
L2 cache 2 MB 4 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 90 nm 32 nm
Max CPUs 8 1
Voltage range 1 - UnknownV 0.82 - 1.48V
Operating temperature 0 - 67°C Unknown - 73°C

overclocking

Overclocked clock speed 1.8 GHz 4.21 GHz
Overclocked clock speed (Water) 1.8 GHz 3 GHz
Overclocked clock speed (Air) 1.8 GHz 4.21 GHz

power consumption

TDP 95W 65W
Annual home energy cost 22.89 $/year 15.66 $/year
Annual commercial energy cost 83.22 $/year 56.94 $/year
Performance per watt 0.67 pt/W 12.36 pt/W
Typical power consumption 77.19W 52.81W
AMD Opteron 865
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AMD Athlon X4 740
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