CPUBoss Review Our evaluation of 980X vs 3820


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)


How much speed can you get out of the processor?

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


Are you paying a premium for performance?

Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Overclocking and Value

Intel Core i7 3820 

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

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Front view of Intel Core i7 3820

Intel Core i7 3820

CPUBoss Winner

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 l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
More l3 cache 12 MB vs 10 MB 20% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 12 vs 8 4 more threads
More cores 6 vs 4 2 more cores; run more applications at once
Slightly better geekbench (64-bit) score 15,418 vs 13,644 Around 15% better geekbench (64-bit) score
Slightly more l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Better cinebench r10 32Bit score 27,056 vs 23,387 More than 15% better cinebench r10 32Bit score
Better overclocked clock speed (Water) 4.9 GHz vs 4.36 GHz More than 10% better overclocked clock speed (Water)
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 8,800 Around 20% better 3DMark11 physics score
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
Supports more RAM 65,536 MB vs 24,576 MB Supports around 2.8x more RAM
Better PassMark (Single core) score 1,939 vs 1,444 Around 35% better PassMark (Single core) score
Significantly better performance per dollar 4.11 pt/$ vs 0.97 pt/$ Around 4.2x better performance per dollar
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Newer Feb, 2012 vs Mar, 2010 Release date over 1 years later
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
Core i7 3820

3D Mark 11 (Physics)

Core i7 980X
Core i7 3820

Cinebench R10 32-Bit

Core i7 980X
Core i7 3820

Cinebench R10 32-Bit (Single Core)

sysmark 2007 (overall)

PassMark Data courtesy PassMark

Reviews Word on the street

Core i7 980X  vs 3820 

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

Specifications Full list of technical specs


Core i7 980X  vs
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


Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
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 5.22 pt/W 6.22 pt/W
Idle power consumption 79.5W 82.6W
Peak power consumption 170W 158.6W
Typical power consumption N/A 139.6W


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


Core i7 980X  vs
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


Overclock popularity 85 142
Overclocked clock speed 4.54 GHz 4.69 GHz
Overclocked clock speed (Water) 4.9 GHz 4.36 GHz
Overclocked clock speed (Air) 4.54 GHz 4.69 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
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 65,536 MB
Intel Core i7 980X
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Intel Core i7 3820
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