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Differences What are the advantages of each

Front view of Intel Xeon X5675

Reasons to consider the
Intel Xeon X5675

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Much higher clock speed 3.06 GHz vs 2.3 GHz Around 35% higher clock speed
Much better overclocked clock speed (Air) 4.29 GHz vs 2.3 GHz More than 85% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.77 GHz vs 2.3 GHz More than 2x better overclocked clock speed (Water)
Much more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Lower typical power consumption 77.19W vs 93.44W More than 15% lower typical power consumption
Lower annual commercial energy cost 83.22 $/year vs 100.74 $/year More than 15% lower annual commercial energy cost
Lower annual home energy cost 22.89 $/year vs 27.7 $/year More than 15% lower annual home energy cost
Front view of AMD Opteron 6275

Reasons to consider the
AMD Opteron 6275

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Much more l2 cache 16 MB vs 2 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l3 cache 16 MB vs 12 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l2 cache per core 1 MB/core vs 0.33 MB/core More than 3x more l2 cache per core
More threads 16 vs 12 4 more threads
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration

Features Key features of the Xeon X5675  vs Opteron 6275 

clock speed

Xeon X5675
3.06 GHz
Opteron 6275
2.3 GHz

L2 cache

L3 cache

Xeon X5675
12 MB
Opteron 6275
16 MB

overclocked clock speed (air)

Xeon X5675
4.29 GHz
Opteron 6275
2.3 GHz

overclocked clock speed (water)

Xeon X5675
4.77 GHz
Opteron 6275
2.3 GHz

TDP

Specifications Full list of technical specs

summary

Xeon X5675  vs
Opteron 6275 
Clock speed 3.06 GHz 2.3 GHz
Cores Hexa core 16 core
Socket type
LGA 1366
G34

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
Supplemental SSE3
AES

bus

Architecture QPI HyperTransport 3.0
Transfer rate 6,400 MT/s 6,400 MT/s
Clock speed 3,200 MHz 3,200 MHz

details

Xeon X5675  vs
Opteron 6275 
Threads 12 16
L2 cache 2 MB 16 MB
L2 cache per core 0.33 MB/core 1 MB/core
L3 cache 12 MB 16 MB
L3 cache per core 2 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 4

overclocking

Overclocked clock speed 4.29 GHz 2.3 GHz
Overclocked clock speed (Water) 4.77 GHz 2.3 GHz
Overclocked clock speed (Air) 4.29 GHz 2.3 GHz

power consumption

TDP 95W 115W
Annual home energy cost 22.89 $/year 27.7 $/year
Annual commercial energy cost 83.22 $/year 100.74 $/year
Typical power consumption 77.19W 93.44W
Intel Xeon X5675
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AMD Opteron 6275
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