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Differences What are the advantages of each

Front view of Intel Xeon E3-1270

Reasons to consider the
Intel Xeon E3-1270

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Much higher clock speed 3.4 GHz vs 2.5 GHz More than 35% higher clock speed
Higher turbo clock speed 3.8 GHz vs 3.5 GHz Around 10% higher turbo clock speed
Much better overclocked clock speed (Air) 3.52 GHz vs 2.5 GHz More than 40% better overclocked clock speed (Air)
Much more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Much better overclocked clock speed (Water) 3.8 GHz vs 2.5 GHz More than 50% better overclocked clock speed (Water)
Front view of AMD Opteron 4274 HE

Reasons to consider the
AMD Opteron 4274 HE

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Much more l2 cache 8 MB vs 1 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 8 vs 4 Twice as many cores; run more applications at once
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Lower typical power consumption 52.81W vs 65W Around 20% lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Lower annual commercial energy cost 56.94 $/year vs 70.08 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 19.27 $/year Around 20% lower annual home energy cost
Newer Nov, 2011 vs Apr, 2011 Release date 7 months later

Features Key features of the Xeon E3-1270  vs Opteron 4274 HE 

clock speed

Xeon E3-1270
3.4 GHz
Opteron 4274 HE
2.5 GHz

turbo clock speed

Xeon E3-1270
3.8 GHz
Opteron 4274 HE
3.5 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E3-1270
3.52 GHz
Opteron 4274 HE
2.5 GHz

overclocked clock speed (water)

Xeon E3-1270
3.8 GHz
Opteron 4274 HE
2.5 GHz

Specifications Full list of technical specs

summary

Xeon E3-1270  vs
Opteron 4274 HE 
Clock speed 3.4 GHz 2.5 GHz
Turbo clock speed 3.8 GHz 3.5 GHz
Cores Quad core Octa core
Socket type
LGA 1155
C32

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES

power consumption

TDP 80W 65W
Annual home energy cost 19.27 $/year 15.66 $/year
Annual commercial energy cost 70.08 $/year 56.94 $/year
Typical power consumption 65W 52.81W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3

details

Xeon E3-1270  vs
Opteron 4274 HE 
Threads 8 8
L2 cache 1 MB 8 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 2
Clock multiplier 34 12
Operating temperature Unknown - 69.1°C Unknown - 68°C

overclocking

Overclocked clock speed 3.52 GHz 2.5 GHz
Overclocked clock speed (Water) 3.8 GHz 2.5 GHz
Overclocked clock speed (Air) 3.52 GHz 2.5 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

bus

Architecture DMI HyperTransport 3.0
Number of links 1 2
Transfer rate 5,000 MT/s 6,400 MT/s
Intel Xeon E3-1270
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AMD Opteron 4274 HE
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