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Differences What are the advantages of each

Front view of Intel Xeon X5679

Reasons to consider the
Intel Xeon X5679

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Higher clock speed 3.2 GHz vs 3.06 GHz Around 5% higher clock speed
Significantly better overclocked clock speed (Air) 4.51 GHz vs 4.29 GHz More than 5% better overclocked clock speed (Air)
Front view of Intel Xeon X5675

Reasons to consider the
Intel Xeon X5675

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Much better overclocked clock speed (Water) 4.77 GHz vs 3.2 GHz Around 50% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon X5679 vs X5675

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon X5679
28,481
Xeon X5675
25,323

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon X5679
2,601
Xeon X5675
2,418

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon X5679
1,705,000 MB/s
Xeon X5675
1,650,000 MB/s

PassMark Data courtesy Passmark

Xeon X5679
8,652
Xeon X5675
8,527

PassMark (Single Core)

Xeon X5679
1,442
Xeon X5675
1,405

Specifications Full list of technical specs

summary

Xeon X5679  vs
X5675 
Clock speed 3.2 GHz 3.06 GHz
Cores Hexa core Hexa core
Socket type
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

bus

Architecture QPI QPI
Number of links 2 2
Data rate 51,200 MB/s 51,200 MB/s
Transfer rate 6,400 MT/s 6,400 MT/s
Clock speed 3,200 MHz 3,200 MHz

details

Xeon X5679  vs
X5675 
Threads 12 12
L2 cache 2 MB 2 MB
L2 cache per core 0.33 MB/core 0.33 MB/core
L3 cache 12 MB 12 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2

overclocking

Overclocked clock speed 4.51 GHz 4.29 GHz
Overclocked clock speed (Water) 3.2 GHz 4.77 GHz
Overclocked clock speed (Air) 4.51 GHz 4.29 GHz

power consumption

Typical power consumption N/A 77.19W
Intel Xeon X5679
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Intel Xeon X5675
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