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Intel Core i7 3820

Front view of Intel Core i7 3820
Front view of Intel Core i7 3770

Intel Core i7 3770

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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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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Front view of Intel Core i7 3770

Reasons to consider the
Intel Core i7 3770

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing

Benchmarks Real world tests of Core i7 3820 vs 3770

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Core i7 3820
0.76 fps
Core i7 3770
-1 fps

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 3820
12,538
Core i7 3770
12,524

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i7 3820
3,098
Core i7 3770
3,236

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 3820
2,500,000 MB/s
Core i7 3770
2,660,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core i7 3820
12,550
Core i7 3770
12,495

GeekBench (64-bit) Data courtesy Primate Labs

Core i7 3820
13,644
Core i7 3770
13,300

PassMark Data courtesy Passmark

Core i7 3820
8,998
Core i7 3770
9,449

PassMark (Single Core)

Core i7 3820
1,943
Core i7 3770
2,072

Specifications Full list of technical specs

summary

 Core i7 3820  vs
3770 
Clock speed 3.6 GHz 3.4 GHz
Turbo clock speed 3.8 GHz 3.9 GHz
Cores Quad core Quad core
Socket type
LGA 2011
LGA 1155
Is unlocked Yes No

features
Has a NX bit Yes Yes
Supports trusted computing No Yes
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

integrated graphics
GPU None GPU
Label N/A Intel® HD Graphics 4000
Latest DirectX N/A 11.x
Number of displays supported N/A 3
GPU clock speed N/A 650 MHz
Turbo clock speed N/A 1,150 MHz
3DMark06 N/A 5,339.9

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

details

 Core i7 3820  vs
3770 
Architecture x86-64 x86-64
Threads 8 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 10 MB 8 MB
L3 cache per core 2.5 MB/core 2 MB/core
Manufacture process 32 nm 22 nm
Transistor count 1,270,000,000 1,300,000,000
Max CPUs 1 1
Clock multiplier 36 34
Operating temperature Unknown - 66.8°C Unknown - 67.4°C

overclocking
Overclock popularity 142 8
Overclock review score 5 0.9
Overclocked clock speed 4.68 GHz 4.03 GHz
Overclocked clock speed (Water) 4.71 GHz 4.32 GHz
PassMark (Overclocked) 5,531.8 3,085.5
Overclocked clock speed (Air) 4.68 GHz 4.03 GHz

power consumption
TDP 130W 77W
Annual home energy cost 49.49 $/year 18.55 $/year
Annual commercial energy cost 138.93 $/year 67.45 $/year
Performance per watt 6.18 pt/W 7.25 pt/W
Typical power consumption 139.6W 62.56W

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 65,771.52 MB 32,768 MB
Intel Core i7 3820
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Intel Core i7 3770
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