CPUBoss Review Our evaluation of 980X vs 3820 among desktop CPUs (over 75W)

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Fire Strike

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

5.8

CPUBoss Score

Combination of all six facets

Winner
Intel Core i7 3820 

CPUBoss recommends the Intel Core i7 3820  based on its single-core performance and value.

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VS

Differences What are the advantages of each

Front view of Intel Core i7 980X

Reasons to consider the
Intel Core i7 980X

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More threads 12 vs 8 4 more threads
More cores 6 vs 4 2 more cores; run more applications at once
Much better cinebench r10 32Bit score 27,056 vs 23,387 More than 15% better cinebench r10 32Bit score
Higher Maximum operating temperature 67.9 °C vs 66.8 °C Almost the same
Slightly better overclocked clock speed (Water) 4.9 GHz vs 4.73 GHz Around 5% better overclocked clock speed (Water)
Front view of Intel Core i7 3820

Reasons to consider the
Intel Core i7 3820

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Supports more RAM 65,771.52 MB vs 24,576 MB Supports around 2.8x more RAM
Higher turbo clock speed 3.8 GHz vs 3.6 GHz More than 5% higher turbo clock speed
Higher clock speed 3.6 GHz vs 3.33 GHz Around 10% higher clock speed
Much more l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Much better PassMark (Single core) score 1,939 vs 1,444 Around 35% better PassMark (Single core) score
Much better cinebench r10 32Bit 1-core score 5,006 vs 4,731 More than 5% better cinebench r10 32Bit 1-core score
Significantly better performance per dollar 4.62 pt/$ vs 0.33 pt/$ More than 14x better performance per dollar
Newer Feb, 2012 vs Mar, 2010 Release date over 1 years later
Better performance per watt 6.99 pt/W vs 1.76 pt/W Around 4x better performance per watt
Better PassMark score 9,014 vs 8,944 Almost the same
Slightly better overclocked clock speed (Air) 4.72 GHz vs 4.54 GHz Around 5% better overclocked clock speed (Air)
Lower annual commercial energy cost 138.93 $/year vs 148.92 $/year More than 5% lower annual commercial energy cost

Benchmarks Real world tests of Core i7 980X vs 3820

GeekBench (32-bit) Data courtesy Primate Labs

Core i7 980X
14,533
Core i7 3820
12,550

GeekBench (64-bit) Data courtesy Primate Labs

Core i7 980X
15,418
Core i7 3820
13,644

GeekBench

Core i7 980X
15,418
Core i7 3820
15,655

3D Mark 11 (Physics)

Core i7 980X
8,800
Core i7 3820
10,460

Cinebench R10 32-Bit

Core i7 980X
27,056
Core i7 3820
23,387

sysmark 2007 (overall)

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Core i7 980X  vs 3820 

9.0
8.0
No wonder the Core i7 980X is a prince among processors.
Core i7 980X

Specifications Full list of technical specs

summary

Core i7 980X  vs
3820 
Clock speed 3.33 GHz 3.6 GHz
Turbo clock speed 3.6 GHz 3.8 GHz
Cores Hexa core Quad core
Socket type
LGA 1366
LGA 2011
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
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 130W
Annual home energy cost 50.68 $/year 49.49 $/year
Annual commercial energy cost 148.92 $/year 138.93 $/year
Performance per watt 1.76 pt/W 6.99 pt/W
Idle power consumption 79.5W 82.6W
Peak power consumption 170W 158.6W
Typical power consumption N/A 139.6W

bus

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

details

Core i7 980X  vs
3820 
Architecture x86-64 x86-64
Threads 12 8
L2 cache 2 MB 1 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 10 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Transistor count 1,170,000,000 1,270,000,000
Max CPUs 1 1
Clock multiplier 25 36
Voltage range 0.8 - 1.38V 0.6 - 1.35V
Operating temperature Unknown - 67.9°C Unknown - 66.8°C

overclocking

Overclock popularity 85 142
Overclocked clock speed 4.54 GHz 4.72 GHz
Overclocked clock speed (Water) 4.9 GHz 4.73 GHz
Overclocked clock speed (Air) 4.54 GHz 4.72 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
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
Channels Triple Channel Quad Channel
Supports ECC No No
Maximum bandwidth 25,599.99 MB/s 51,200 MB/s
Maximum memory size 24,576 MB 65,771.52 MB
Intel Core i7 980X
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Intel Core i7 3820
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