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Differences What are the advantages of each

Front view of Intel Core i7 920

Reasons to consider the
Intel Core i7 920

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Significantly higher clock speed 2.66 GHz vs 1.8 GHz Around 50% higher clock speed
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l3 cache 8 MB vs 2 MB 4x more l3 cache; more data can be stored in the l3 cache for quick access later
Much better overclocked clock speed (Air) 4.22 GHz vs 1.8 GHz More than 2.2x better overclocked clock speed (Air)
Much more l3 cache per core 2 MB/core vs 0.5 MB/core 4x more l3 cache per core
More threads 8 vs 4 Twice as many threads
Higher Maximum operating temperature 67.9 °C vs 55 °C Around 25% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.24 GHz vs 1.8 GHz More than 2.2x better overclocked clock speed (Water)
Newer Oct, 2008 vs Sep, 2007 Release date over 1 years later
Front view of AMD Opteron 2346 HE

Reasons to consider the
AMD Opteron 2346 HE

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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 lower typical power consumption 44.69W vs 135.63W 3x lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 13.25 $/year vs 48.38 $/year 3.7x lower annual home energy cost
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual commercial energy cost 48.18 $/year vs 134.55 $/year 2.8x lower annual commercial energy cost

Features Key features of the Core i7 920  vs Opteron 2346 HE 

clock speed

Core i7 920
2.66 GHz
Opteron 2346 HE
1.8 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Core i7 920
4.22 GHz
Opteron 2346 HE
1.8 GHz

overclocked clock speed (water)

Core i7 920
4.24 GHz
Opteron 2346 HE
1.8 GHz

Specifications Full list of technical specs

summary

Core i7 920  vs
Opteron 2346 HE 
Clock speed 2.66 GHz 1.8 GHz
Cores Quad core Quad core
Socket type
LGA 1366
F
Is unlocked No No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 55W
Annual home energy cost 48.38 $/year 13.25 $/year
Annual commercial energy cost 134.55 $/year 48.18 $/year
Typical power consumption 135.63W 44.69W

bus

Clock speed 2,400 MHz 1,000 MHz

details

Core i7 920  vs
Opteron 2346 HE 
Threads 8 4
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 2 MB
L3 cache per core 2 MB/core 0.5 MB/core
Manufacture process 45 nm 65 nm
Max CPUs 1 2
Clock multiplier 20 9
Voltage range 0.8 - 1.38V 1.12 - UnknownV
Operating temperature Unknown - 67.9°C 0 - 55°C

overclocking

Overclocked clock speed 4.22 GHz 1.8 GHz
Overclocked clock speed (Water) 4.24 GHz 1.8 GHz
Overclocked clock speed (Air) 4.22 GHz 1.8 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A
Intel Core i7 920
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AMD Opteron 2346 HE
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