CPUBoss Review Our evaluation of 3820 vs 4670K

Performance

Benchmark performance using all cores

Cinebench R10 32-bit, PassMark, GeekBench (32-bit) and GeekBench (64-bit)

Single-core Performance

Individual core benchmark performance

Cinebench R10 32-bit (1-core) and PassMark (Single Core)

Overclocking

How much speed can you get out of the processor?

PassMark (Overclocked), Unlocked, Maximum Overclocked Clock Speed (Air) and 2 more

Value

Are you paying a premium for performance?

Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Overclocking and Value

Winner
Intel Core i5 4670K 

CPUBoss recommends the Intel Core i5 4670K  based on its .

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VS
Front view of Intel Core i5 4670K

Intel Core i5 4670K

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Core i7 3820

Reasons to consider the
Intel Core i7 3820

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Much better 3DMark11 physics score 10,460 vs 6,830 Around 55% better 3DMark11 physics score
More l3 cache 10 MB vs 6 MB More than 65% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 8 vs 4 Twice as many threads
Higher clock speed 3.6 GHz vs 3.4 GHz More than 5% higher clock speed
Supports more RAM 65,536 MB vs 32,768 MB Supports 2x more RAM
Much more l3 cache per core 2.5 MB/core vs 1.5 MB/core More than 65% more l3 cache per core
Better PassMark score 9,014 vs 7,665 Around 20% better PassMark score
Slightly better overclocked clock speed (Air) 4.7 GHz vs 4.49 GHz Around 5% better overclocked clock speed (Air)
Front view of Intel Core i5 4670K

Reasons to consider the
Intel Core i5 4670K

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 68.25W vs 139.6W 2x lower typical power consumption
Higher Maximum operating temperature 72.72 °C vs 66.8 °C Around 10% higher Maximum operating temperature
Better performance per watt 11.98 pt/W vs 6.23 pt/W More than 90% better performance per watt
Better PassMark (Single core) score 2,205 vs 1,938 Around 15% better PassMark (Single core) score
Much lower annual home energy cost 20.24 $/year vs 49.49 $/year 2.4x lower annual home energy cost
Better cinebench r10 32Bit 1-core score 7,335 vs 5,006 More than 45% better cinebench r10 32Bit 1-core score
Better performance per dollar 5.24 pt/$ vs 4.12 pt/$ More than 25% better performance per dollar
Much lower annual commercial energy cost 73.58 $/year vs 138.93 $/year More than 45% lower annual commercial energy cost
Newer Apr, 2013 vs Feb, 2012 Release date over 1 years later

Benchmarks Real world tests of Core i7 3820 vs i5 4670K

GeekBench (32-bit) Data courtesy Primate Labs

Core i7 3820
12,550
Core i5 4670K
11,573

3D Mark 11 (Physics)

Cinebench R10 32-Bit

Core i7 3820
23,387
Core i5 4670K
25,519

Cinebench R10 32-Bit (Single Core)

PassMark Data courtesy PassMark

PassMark (Single Core) Data courtesy PassMark

Reviews Word on the street

Core i7 3820  vs i5 4670K 

8.0
8.0
Predictably things are pretty close in terms of raw performance.
Core i7 3820

Specifications Full list of technical specs

summary

Core i7 3820  vs
i5 4670K 
Clock speed 3.6 GHz 3.4 GHz
Turbo clock speed 3.8 GHz 3.8 GHz
Cores Quad core Quad core
Is unlocked Yes Yes

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
F16C
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
FMA3
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 84W
Annual home energy cost 49.49 $/year 20.24 $/year
Annual commercial energy cost 138.93 $/year 73.58 $/year
Performance per watt 6.23 pt/W 11.98 pt/W
Typical power consumption 139.6W 68.25W

bus

Architecture DMI 2.0 DMI 2.0
Number of links 1 0
Transfer rate 5,000 MT/s 5,000 MT/s

details

Core i7 3820  vs
i5 4670K 
Architecture x86-64 x86-64
Threads 8 4
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 10 MB 6 MB
L3 cache per core 2.5 MB/core 1.5 MB/core
Manufacture process 32 nm 22 nm
Max CPUs 1 1
Operating temperature Unknown - 66.8°C Unknown - 72.72°C

overclocking

Overclock popularity 142 57
Overclocked clock speed 4.7 GHz 4.49 GHz
Overclocked clock speed (Water) 4.38 GHz 4.54 GHz
PassMark (Overclocked) 5,531.8 5,198.5
Overclocked clock speed (Air) 4.7 GHz 4.49 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 4600
Number of displays supported N/A 3
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 1,200 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
Channels Quad Channel Dual Channel
Supports ECC No No
Maximum bandwidth 51,200 MB/s 25,600 MB/s
Maximum memory size 65,536 MB 32,768 MB
Intel Core i7 3820
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Intel Core i5 4670K
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