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Differences What are the advantages of each

Front view of Intel Xeon E5-2690

Reasons to consider the
Intel Xeon E5-2690

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Much higher clock speed 2.9 GHz vs 1.8 GHz More than 60% higher clock speed
Much more l3 cache 20 MB vs 2 MB 10x more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 16 vs 4 12 more threads
More cores 8 vs 4 Twice as many cores; run more applications at once
Much better overclocked clock speed (Air) 3.53 GHz vs 2.02 GHz More than 75% better overclocked clock speed (Air)
Significantly newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l3 cache per core 2.5 MB/core vs 0.5 MB/core 5x more l3 cache per core
Much better overclocked clock speed (Water) 3.92 GHz vs 1.8 GHz Around 2.2x better overclocked clock speed (Water)
Newer Mar, 2012 vs Sep, 2007 Release date over 4 years later
Front view of AMD Opteron 8346 HE

Reasons to consider the
AMD Opteron 8346 HE

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Much lower typical power consumption 44.69W vs 109.69W 2.5x lower typical power consumption
Supports more CPUs in SMP configuration 8 vs 2 6 supports more CPUs in SMP configuration
Much 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 118.26 $/year 2.5x lower annual commercial energy cost
Much lower annual home energy cost 13.25 $/year vs 32.52 $/year 2.5x lower annual home energy cost

Features Key features of the Xeon E5-2690  vs Opteron 8346 HE 

clock speed

Xeon E5-2690
2.9 GHz
Opteron 8346 HE
1.8 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E5-2690
3.53 GHz
Opteron 8346 HE
2.02 GHz

overclocked clock speed (water)

Xeon E5-2690
3.92 GHz
Opteron 8346 HE
1.8 GHz

Specifications Full list of technical specs

summary

Xeon E5-2690  vs
Opteron 8346 HE 
Clock speed 2.9 GHz 1.8 GHz
Cores Octa core Quad core
Socket type
LGA 2011
F

features

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

power consumption

TDP 135W 55W
Annual home energy cost 32.52 $/year 13.25 $/year
Annual commercial energy cost 118.26 $/year 48.18 $/year
Typical power consumption 109.69W 44.69W

bus

Clock speed 4,000 MHz 1,600 MHz

details

Xeon E5-2690  vs
Opteron 8346 HE 
Threads 16 4
L2 cache 2 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 20 MB 2 MB
L3 cache per core 2.5 MB/core 0.5 MB/core
Manufacture process 32 nm 65 nm
Max CPUs 2 8
Clock multiplier 38 9
Voltage range 0.6 - 1.35V 1.12 - UnknownV
Operating temperature Unknown - 72°C 0 - 55°C

overclocking

Overclocked clock speed 3.53 GHz 2.02 GHz
Overclocked clock speed (Water) 3.92 GHz 1.8 GHz
Overclocked clock speed (Air) 3.53 GHz 2.02 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 Xeon E5-2690
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AMD Opteron 8346 HE
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