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Differences What are the advantages of each

Front view of Intel Xeon E3-1240

Reasons to consider the
Intel Xeon E3-1240

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Much higher clock speed 3.3 GHz vs 2.6 GHz More than 25% higher clock speed
Much better overclocked clock speed (Air) 3.71 GHz vs 2.6 GHz Around 45% better overclocked clock speed (Air)
Higher turbo clock speed 3.7 GHz vs 3.6 GHz Around 5% higher turbo clock speed
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) 3.4 GHz vs 2.6 GHz More than 30% better overclocked clock speed (Water)
Front view of AMD Opteron 4376 HE

Reasons to consider the
AMD Opteron 4376 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
Newer Dec, 2012 vs Apr, 2011 Release date over 1 years later
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

Features Key features of the Xeon E3-1240  vs Opteron 4376 HE 

clock speed

Xeon E3-1240
3.3 GHz
Opteron 4376 HE
2.6 GHz

turbo clock speed

Xeon E3-1240
3.7 GHz
Opteron 4376 HE
3.6 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E3-1240
3.71 GHz
Opteron 4376 HE
2.6 GHz

overclocked clock speed (water)

Xeon E3-1240
3.4 GHz
Opteron 4376 HE
2.6 GHz

Specifications Full list of technical specs

summary

Xeon E3-1240  vs
Opteron 4376 HE 
Clock speed 3.3 GHz 2.6 GHz
Turbo clock speed 3.7 GHz 3.6 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
AVX 1.1
SSE2
F16C
MMX
SSE4
XOP
AVX
SSE3
SSE
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

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
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 21,333.32 MB/s 12,800 MB/s

details

Xeon E3-1240  vs
Opteron 4376 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 33 13
Operating temperature Unknown - 69.1°C Unknown - 68°C

overclocking

Overclocked clock speed 3.71 GHz 2.6 GHz
Overclocked clock speed (Water) 3.4 GHz 2.6 GHz
Overclocked clock speed (Air) 3.71 GHz 2.6 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
Transfer rate 5,000 MT/s 6,400 MT/s
Intel Xeon E3-1240
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AMD Opteron 4376 HE
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