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Differences What are the advantages of each

Front view of Intel Xeon E3-1245 v2

Reasons to consider the
Intel Xeon E3-1245 v2

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Much higher clock speed 3.4 GHz vs 3.1 GHz Around 10% higher clock speed
Much better performance per watt 9.49 pt/W vs 0.67 pt/W More than 14x better performance per watt
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Much better overclocked clock speed (Air) 3.75 GHz vs 3.41 GHz Around 10% better overclocked clock speed (Air)
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower typical power consumption 62.56W vs 77.19W Around 20% lower typical power consumption
Significantly better overclocked clock speed (Water) 3.4 GHz vs 3.1 GHz Around 10% better overclocked clock speed (Water)
Lower annual commercial energy cost 67.45 $/year vs 83.22 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 18.55 $/year vs 22.89 $/year Around 20% lower annual home energy cost
Front view of AMD Opteron 4386

Reasons to consider the
AMD Opteron 4386

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Much more l2 cache 8 MB vs 1 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 8 vs 4 Twice as many cores; run more applications at once
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Newer Dec, 2012 vs May, 2012 Release date 6 months later

Benchmarks Real world tests of Xeon E3-1245 v2 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 E3-1245 v2
2,520,000 MB/s
Opteron 4386
2,200 MB/s

Specifications Full list of technical specs

summary

Xeon E3-1245 v2  vs
Opteron 4386 
Clock speed 3.4 GHz 3.1 GHz
Turbo clock speed 3.8 GHz 3.8 GHz
Cores Quad core Octa core
Socket type
LGA 1155
C32

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
SSE4
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 77W 95W
Annual home energy cost 18.55 $/year 22.89 $/year
Annual commercial energy cost 67.45 $/year 83.22 $/year
Performance per watt 9.49 pt/W 0.67 pt/W
Typical power consumption 62.56W 77.19W

bus

Architecture DMI HyperTransport 3.0
Transfer rate 5,000 MT/s 6,400 MT/s

details

Xeon E3-1245 v2  vs
Opteron 4386 
Threads 8 8
L2 cache 1 MB 8 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 1 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 1 2
Clock multiplier 34 19

overclocking

Overclocked clock speed 3.75 GHz 3.41 GHz
Overclocked clock speed (Water) 3.4 GHz 3.1 GHz
Overclocked clock speed (Air) 3.75 GHz 3.41 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics P4000 N/A
Number of displays supported 3 N/A
GPU clock speed 650 MHz N/A
Turbo clock speed 1,250 MHz N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 12,800 MB/s
Intel Xeon E3-1245 v2
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AMD Opteron 4386
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