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Differences What are the advantages of each

Front view of Intel Xeon E5-2620

Reasons to consider the
Intel Xeon E5-2620

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More cores 6 vs 2 Three times as many cores; run more applications at once
More threads 12 vs 2 10 more threads
Much newer manufacturing process 32 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better performance per watt 6.57 pt/W vs 1.56 pt/W Around 4.2x better performance per watt
Newer Mar, 2012 vs Mar, 2006 Release date over 6 years later
Front view of AMD Opteron 885

Reasons to consider the
AMD Opteron 885

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Much higher clock speed 2.6 GHz vs 2 GHz More than 30% higher clock speed
Much more l2 cache per core 1 MB/core vs 0.33 MB/core More than 3x more l2 cache per core
Supports more CPUs in SMP configuration 8 vs 2 6 supports more CPUs in SMP configuration
Much better overclocked clock speed (Air) 2.75 GHz vs 2.28 GHz More than 20% better overclocked clock speed (Air)
Lower typical power consumption 69.06W vs 77.19W More than 10% lower typical power consumption
Much better overclocked clock speed (Water) 2.6 GHz vs 2 GHz More than 30% better overclocked clock speed (Water)
Lower annual commercial energy cost 74.46 $/year vs 83.22 $/year More than 10% lower annual commercial energy cost
Lower annual home energy cost 20.48 $/year vs 22.89 $/year More than 10% lower annual home energy cost

Benchmarks Real world tests of Xeon E5-2620 vs Opteron 885

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5-2620
10,510
Opteron 885
6,967

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-2620
1,315,000 MB/s
Opteron 885
71,800 MB/s

Specifications Full list of technical specs

summary

Xeon E5-2620  vs
Opteron 885 
Clock speed 2 GHz 2.6 GHz
Cores Hexa core Dual core
Socket type
LGA 2011
940

features

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

details

Xeon E5-2620  vs
Opteron 885 
Threads 12 2
L2 cache 2 MB 2 MB
L2 cache per core 0.33 MB/core 1 MB/core
Manufacture process 32 nm 90 nm
Max CPUs 2 8
Clock multiplier 25 13
Voltage range 0.6 - 1.35V 1 - UnknownV
Operating temperature Unknown - 77.4°C 0 - 67°C

overclocking

Overclocked clock speed 2.28 GHz 2.75 GHz
Overclocked clock speed (Water) 2 GHz 2.6 GHz
Overclocked clock speed (Air) 2.28 GHz 2.75 GHz

power consumption

TDP 95W 85W
Annual home energy cost 22.89 $/year 20.48 $/year
Annual commercial energy cost 83.22 $/year 74.46 $/year
Performance per watt 6.57 pt/W 1.56 pt/W
Typical power consumption 77.19W 69.06W
Intel Xeon E5-2620
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AMD Opteron 885
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