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Differences What are the advantages of each

Front view of Intel Core i7 820QM

Reasons to consider the
Intel Core i7 820QM

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Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 36.56W vs 77.19W 2.1x lower typical power consumption
More threads 8 vs 2 6 more threads
More cores 4 vs 2 Twice as many cores; run more applications at once
Newer Sep, 2009 vs Feb, 2007 Release date over 2 years later
Much lower annual home energy cost 10.84 $/year vs 22.89 $/year 2.1x lower annual home energy cost
Much lower annual commercial energy cost 39.42 $/year vs 83.22 $/year 2.1x lower annual commercial energy cost
Front view of AMD Second Generation Opteron 2220

Reasons to consider the
AMD Second Generation Opteron 2220

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Significantly higher clock speed 2.8 GHz vs 1.73 GHz More than 60% higher clock speed
Significantly more l2 cache 2 MB vs 1 MB 2x 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 Core i7 820QM  vs Second Generation Opteron 2220 

Specifications Full list of technical specs

summary

Core i7 820QM  vs
Second Generation Opteron 2220 
Clock speed 1.73 GHz 2.8 GHz
Cores Quad core Dual core
Socket type
rPGA 988A
F

features

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

details

Core i7 820QM  vs
Second Generation Opteron 2220 
Threads 8 2
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 1 2

power consumption

TDP 45W 95W
Annual home energy cost 10.84 $/year 22.89 $/year
Annual commercial energy cost 39.42 $/year 83.22 $/year
Typical power consumption 36.56W 77.19W
Intel Core i7 820QM
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AMD Second Generation Opteron 2220
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