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Differences What are the advantages of each

Front view of Intel Xeon E5-4650

Reasons to consider the
Intel Xeon E5-4650

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Higher clock speed 2.7 GHz vs 2.6 GHz Around 5% higher clock speed
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration
Front view of Intel Xeon E5-2670

Reasons to consider the
Intel Xeon E5-2670

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Much better performance per watt 7.31 pt/W vs 2.52 pt/W Around 3x better performance per watt
Lower typical power consumption 93.44W vs 105.63W More than 10% lower typical power consumption
Better overclocked clock speed (Air) 3.13 GHz vs 2.94 GHz More than 5% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 3.08 GHz vs 2.7 GHz Around 15% better overclocked clock speed (Water)
Lower annual commercial energy cost 100.74 $/year vs 113.88 $/year More than 10% lower annual commercial energy cost
Lower annual home energy cost 27.7 $/year vs 31.32 $/year More than 10% lower annual home energy cost

Benchmarks Real world tests of Xeon E5-4650 vs E5-2670

PassMark Data courtesy Passmark

Xeon E5-4650
Xeon E5-2670

PassMark (Single Core)

Specifications Full list of technical specs


Xeon E5-4650  vs
Clock speed 2.7 GHz 2.6 GHz
Turbo clock speed 3.3 GHz 3.3 GHz
Cores Octa core Octa core
Socket type
LGA 2011


Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 115W
Annual home energy cost 31.32 $/year 27.7 $/year
Annual commercial energy cost 113.88 $/year 100.74 $/year
Performance per watt 2.52 pt/W 7.31 pt/W
Typical power consumption 105.63W 93.44W


Architecture QPI QPI
Number of links 2 2
Data rate 64,000 MB/s 64,000 MB/s
Transfer rate 8,000 MT/s 8,000 MT/s
Clock speed 4,000 MHz 4,000 MHz


Xeon E5-4650  vs
Architecture x86-64 x86-64
Threads 16 16
L2 cache 2 MB 2 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 20 MB 20 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 4 2
Voltage range 0.6 - 1.35V 0.6 - 1.35V


Overclocked clock speed 2.94 GHz 3.13 GHz
Overclocked clock speed (Water) 2.7 GHz 3.08 GHz
Overclocked clock speed (Air) 2.94 GHz 3.13 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

memory controller

Memory controller Built-in Built-in
Memory type
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 51,200 MB/s 51,200 MB/s
Maximum memory size 393,216 MB 393,216 MB
Intel Xeon E5-4650
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Intel Xeon E5-2670
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