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Differences What are the advantages of each

Front view of Intel Xeon E5 2620 v2

Reasons to consider the
Intel Xeon E5 2620 v2

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Significantly newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l3 cache 15 MB vs 8 MB Around 90% more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l3 cache per core 2.5 MB/core vs 1 MB/core 2.5x more l3 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Significantly better geekbench 3 Multi-Core score 12,819 vs 10,502 More than 20% better geekbench 3 Multi-Core score
Lower typical power consumption 65W vs 77.19W More than 15% lower typical power consumption
More threads 12 vs 8 4 more threads
Better performance per watt 12.06 pt/W vs 10.58 pt/W Around 15% better performance per watt
Lower annual home energy cost 19.27 $/year vs 22.89 $/year More than 15% lower annual home energy cost
Lower annual commercial energy cost 70.08 $/year vs 83.22 $/year More than 15% lower annual commercial energy cost
Newer Jul, 2013 vs Dec, 2012 Release date 6 months later
Front view of AMD FX 8300

Reasons to consider the
AMD FX 8300

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Much more l2 cache 8 MB vs 1.5 MB More than 5.2x more l2 cache; more data can be stored in the l2 cache for quick access later
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much higher turbo clock speed 4.2 GHz vs 2.6 GHz More than 60% higher turbo clock speed
Significantly higher clock speed 3.3 GHz vs 2.1 GHz More than 55% higher clock speed
Much better overclocked clock speed (Air) 4.61 GHz vs 2.25 GHz More than 2x better overclocked clock speed (Air)
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
More cores 8 vs 6 2 more cores; run more applications at once
Much better overclocked clock speed (Water) 4.51 GHz vs 2.1 GHz Around 2.2x better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E5 2620 v2 vs FX 8300

GeekBench 3 (Multi-core) Data courtesy Primate Labs

FX 8300
10,502

GeekBench 3 (Single core) Data courtesy Primate Labs

FX 8300
2,159

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5 2620 v2
1,400,000 MB/s
FX 8300
2,420,000 MB/s

Specifications Full list of technical specs

summary

Xeon E5 2620 v2  vs
FX 8300 
Clock speed 2.1 GHz 3.3 GHz
Turbo clock speed 2.6 GHz 4.2 GHz
Cores Hexa core Octa core
Socket type
LGA 2011
AM3+
Is unlocked No Yes

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
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 80W 95W
Annual home energy cost 19.27 $/year 22.89 $/year
Annual commercial energy cost 70.08 $/year 83.22 $/year
Performance per watt 12.06 pt/W 10.58 pt/W
Typical power consumption 65W 77.19W

details

Xeon E5 2620 v2  vs
FX 8300 
Architecture x86-64 x86-64
Threads 12 8
L2 cache 1.5 MB 8 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 15 MB 8 MB
L3 cache per core 2.5 MB/core 1 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 2 1
Clock multiplier 21 21
Operating temperature Unknown - 71°C Unknown - 70.5°C

overclocking

Overclocked clock speed 2.25 GHz 4.61 GHz
Overclocked clock speed (Water) 2.1 GHz 4.51 GHz
Overclocked clock speed (Air) 2.25 GHz 4.61 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 2620 v2
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AMD FX 8300
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