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Differences What are the advantages of each

Front view of Intel Xeon E5-2660

Reasons to consider the
Intel Xeon E5-2660

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Much 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
Much better performance per watt 7.69 pt/W vs 0.67 pt/W Around 11.5x better performance per watt
More threads 16 vs 8 Twice as many threads
Much more l3 cache per core 2.5 MB/core vs 1 MB/core 2.5x more l3 cache per core
Better overclocked clock speed (Water) 3.17 GHz vs 3.1 GHz Almost the same
Front view of AMD Opteron 4386

Reasons to consider the
AMD Opteron 4386

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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 higher clock speed 3.1 GHz vs 2.2 GHz More than 40% higher clock speed
Much higher turbo clock speed 3.8 GHz vs 3 GHz More than 25% 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) 3.41 GHz vs 2.65 GHz Around 30% better overclocked clock speed (Air)
Newer Dec, 2012 vs Mar, 2012 Release date 9 months later

Benchmarks Real world tests of Xeon E5-2660 vs Opteron 4386

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-2660
1,540,000 MB/s
Opteron 4386
2,200 MB/s

Specifications Full list of technical specs

summary

Xeon E5-2660  vs
Opteron 4386 
Clock speed 2.2 GHz 3.1 GHz
Turbo clock speed 3 GHz 3.8 GHz
Cores Octa core Octa core
Socket type
LGA 2011
C32

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
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 95W
Annual home energy cost 22.89 $/year 22.89 $/year
Annual commercial energy cost 83.22 $/year 83.22 $/year
Performance per watt 7.69 pt/W 0.67 pt/W
Typical power consumption 77.19W 77.19W

bus

Architecture QPI HyperTransport 3.0
Transfer rate 8,000 MT/s 6,400 MT/s
Clock speed 4,000 MHz 3,200 MHz

details

Xeon E5-2660  vs
Opteron 4386 
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 2 2
Clock multiplier 30 19
Operating temperature Unknown - 73°C Unknown - 70.5°C

overclocking

Overclocked clock speed 2.65 GHz 3.41 GHz
Overclocked clock speed (Water) 3.17 GHz 3.1 GHz
Overclocked clock speed (Air) 2.65 GHz 3.41 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
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Quad Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 51,200 MB/s 12,800 MB/s
Intel Xeon E5-2660
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AMD Opteron 4386
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