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Differences What are the advantages of each

Front view of Intel Core i7 4790K

Reasons to consider the
Intel Core i7 4790K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Significantly higher clock speed 4 GHz vs 2.8 GHz Around 45% higher clock speed
Higher turbo clock speed 4.4 GHz vs 3.6 GHz More than 20% higher turbo clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Significantly newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 4.63 GHz vs 2.8 GHz More than 65% better overclocked clock speed (Air)
Significantly more l3 cache per core 2 MB/core vs 1.33 MB/core More than 50% more l3 cache per core
Newer Apr, 2014 vs Nov, 2011 Release date over 2 years later
More threads 8 vs 6 2 more threads
Much better overclocked clock speed (Water) 4.8 GHz vs 2.8 GHz More than 70% better overclocked clock speed (Water)
Higher Maximum operating temperature 74.04 °C vs 68 °C Around 10% higher Maximum operating temperature
Front view of AMD Opteron 4228 HE

Reasons to consider the
AMD Opteron 4228 HE

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Much more l2 cache 6 MB vs 1 MB 6x more l2 cache; more data can be stored in the l2 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
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Lower typical power consumption 52.81W vs 71.5W More than 25% lower typical power consumption
More cores 6 vs 4 2 more cores; run more applications at once
Lower annual home energy cost 15.66 $/year vs 21.2 $/year More than 25% lower annual home energy cost
Lower annual commercial energy cost 56.94 $/year vs 77.09 $/year More than 25% lower annual commercial energy cost

Features Key features of the Core i7 4790K  vs Opteron 4228 HE 

clock speed

turbo clock speed

Core i7 4790K
4.4 GHz
Opteron 4228 HE
3.6 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Core i7 4790K
4.63 GHz
Opteron 4228 HE
2.8 GHz

overclocked clock speed (water)

Core i7 4790K
4.8 GHz
Opteron 4228 HE
2.8 GHz

Specifications Full list of technical specs

summary

Core i7 4790K  vs
Opteron 4228 HE 
Clock speed 4 GHz 2.8 GHz
Turbo clock speed 4.4 GHz 3.6 GHz
Cores Quad core Hexa core
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
F16C
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
FMA3
SSE4.2
Supplemental SSE3
AES
AVX 2.0

power consumption

TDP 88W 65W
Annual home energy cost 21.2 $/year 15.66 $/year
Annual commercial energy cost 77.09 $/year 56.94 $/year
Typical power consumption 71.5W 52.81W

bus

Architecture DMI 2.0 HyperTransport 3.0
Number of links 0 2
Transfer rate 5,000 MT/s 6,400 MT/s

details

Core i7 4790K  vs
Opteron 4228 HE 
Threads 8 6
L2 cache 1 MB 6 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 1.33 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 1 2
Operating temperature Unknown - 74.04°C Unknown - 68°C

overclocking

Overclocked clock speed 4.63 GHz 2.8 GHz
Overclocked clock speed (Water) 4.8 GHz 2.8 GHz
Overclocked clock speed (Air) 4.63 GHz 2.8 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 4600 N/A
Number of displays supported 3 N/A
GPU clock speed 350 MHz N/A
Turbo clock speed 1,250 MHz N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3L-1600
DDR3-1333
DDR3
Intel Core i7 4790K
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AMD Opteron 4228 HE
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