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Differences What are the advantages of each

Front view of Intel Core i7 4820K

Reasons to consider the
Intel Core i7 4820K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Significantly higher clock speed 3.7 GHz vs 2.6 GHz More than 40% higher clock speed
Higher turbo clock speed 3.9 GHz vs 3.2 GHz More than 20% higher turbo clock speed
Significantly newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better PassMark (Single core) score 2,009 vs 933 Around 2.2x better PassMark (Single core) score
Much better overclocked clock speed (Air) 4.57 GHz vs 2.9 GHz Around 60% better overclocked clock speed (Air)
Better PassMark score 9,740 vs 5,776 Around 70% better PassMark score
Better performance per watt 8.43 pt/W vs 5.87 pt/W Around 45% better performance per watt
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Much better overclocked clock speed (Water) 4.68 GHz vs 2.6 GHz More than 80% better overclocked clock speed (Water)
Newer Jul, 2013 vs Nov, 2011 Release date over 1 years later
Front view of AMD Opteron 6212

Reasons to consider the
AMD Opteron 6212

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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
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More l3 cache 16 MB vs 10 MB 60% more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
More cores 8 vs 4 Twice as many cores; run more applications at once
Lower typical power consumption 93.44W vs 105.63W More than 10% lower typical power consumption
Higher Maximum operating temperature 71.7 °C vs 66.8 °C More than 5% higher Maximum operating temperature
Lower annual home energy cost 27.7 $/year vs 31.32 $/year More than 10% lower annual home energy cost
Lower annual commercial energy cost 100.74 $/year vs 113.88 $/year More than 10% lower annual commercial energy cost

Benchmarks Real world tests of Core i7 4820K vs Opteron 6212

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 4820K
13,311
Opteron 6212
10,686

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 4820K
2,500,000 MB/s
Opteron 6212
1,555,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 4820K  vs
Opteron 6212 
Clock speed 3.7 GHz 2.6 GHz
Turbo clock speed 3.9 GHz 3.2 GHz
Cores Quad core Octa core
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES

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 8.43 pt/W 5.87 pt/W
Typical power consumption 105.63W 93.44W

bus

Architecture DMI 2.0 HyperTransport 3.0
Number of links 1 4
Transfer rate 5,000 MT/s 6,400 MT/s

details

Core i7 4820K  vs
Opteron 6212 
Threads 8 8
L2 cache 1 MB 8 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 10 MB 16 MB
L3 cache per core 2.5 MB/core 2 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 1 4
Operating temperature Unknown - 66.8°C Unknown - 71.7°C

overclocking

Overclocked clock speed 4.57 GHz 2.9 GHz
Overclocked clock speed (Water) 4.68 GHz 2.6 GHz
Overclocked clock speed (Air) 4.57 GHz 2.9 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
Intel Core i7 4820K
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AMD Opteron 6212
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