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Differences What are the advantages of each

Front view of Intel Xeon E5-4640

Reasons to consider the
Intel Xeon E5-4640

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Much lower typical power consumption 77.19W vs 159.66W 2.1x lower typical power consumption
Significantly more l3 cache 20 MB vs 8 MB 2.5x more l3 cache; more data can be stored in the l3 cache for quick access later
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
Much more l3 cache per core 2.5 MB/core vs 1 MB/core 2.5x more l3 cache per core
More threads 16 vs 8 Twice as many threads
Much lower annual home energy cost 22.89 $/year vs 56.1 $/year 2.5x lower annual home energy cost
Much lower annual commercial energy cost 83.22 $/year vs 159.62 $/year Around 50% lower annual commercial energy cost
Better PassMark score 10,523 vs 9,134 More than 15% better PassMark score
Front view of AMD FX 8350

Reasons to consider the
AMD FX 8350

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Much more l2 cache 8 MB vs 2 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better performance per dollar 8.15 pt/$ vs 0.17 pt/$ More than 46.8x better performance per dollar
Much higher clock speed 4 GHz vs 2.4 GHz More than 65% higher clock speed
Much higher turbo clock speed 4.2 GHz vs 2.8 GHz More than 50% higher turbo clock speed
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Much better overclocked clock speed (Air) 4.69 GHz vs 2.63 GHz Around 80% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 8.79 GHz vs 2.4 GHz Around 3.8x better overclocked clock speed (Water)
Significantly better performance per watt 5.72 pt/W vs 1.83 pt/W Around 3.2x better performance per watt
Newer Oct, 2012 vs May, 2012 Release date 5 months later

Benchmarks Real world tests of Xeon E5-4640 vs FX 8350

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5-4640
5,597.5
FX 8350
11,483

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5-4640
1,573
FX 8350
2,193

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-4640
103.35 MB/s
FX 8350
2,470,000 MB/s

PassMark Data courtesy Passmark

Xeon E5-4640
10,523
FX 8350
9,134

PassMark (Single Core)

Xeon E5-4640
1,423
FX 8350
1,525

Specifications Full list of technical specs

summary

Xeon E5-4640  vs
FX 8350 
Clock speed 2.4 GHz 4 GHz
Turbo clock speed 2.8 GHz 4.2 GHz
Cores Octa core Octa core
Socket type
LGA 2011
AM3+

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
AVX
SSE3
SSE
ABM
BMI1
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 125W
Annual home energy cost 22.89 $/year 56.1 $/year
Annual commercial energy cost 83.22 $/year 159.62 $/year
Performance per watt 1.83 pt/W 5.72 pt/W
Typical power consumption 77.19W 159.66W

bus

Clock speed 4,000 MHz 2,600 MHz

details

Xeon E5-4640  vs
FX 8350 
Architecture x86-64 x86-64
Threads 16 8
L2 cache 2 MB 8 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 20 MB 8 MB
L3 cache per core 2.5 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 4 1
Voltage range 0.6 - 1.35V 0.81 - 1.45V

overclocking

Overclocked clock speed 2.63 GHz 4.69 GHz
Overclocked clock speed (Water) 2.4 GHz 8.79 GHz
Overclocked clock speed (Air) 2.63 GHz 4.69 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
DDR3-1866
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Quad Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 51,200 MB/s 29,866.66 MB/s
Intel Xeon E5-4640
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AMD FX 8350
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