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Differences What are the advantages of each

Front view of Intel Core i7 920

Reasons to consider the
Intel Core i7 920

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More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Air) 4.22 GHz vs 3.49 GHz More than 20% better overclocked clock speed (Air)
Higher Maximum operating temperature 67.9 °C vs 65.3 °C Around 5% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.24 GHz vs 3.3 GHz Around 30% better overclocked clock speed (Water)
Front view of Intel Core i3 3225

Reasons to consider the
Intel Core i3 3225

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Much higher clock speed 3.3 GHz vs 2.66 GHz Around 25% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 44.69W vs 135.63W 3x lower typical power consumption
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual home energy cost 13.25 $/year vs 48.38 $/year 3.7x lower annual home energy cost
Much lower annual commercial energy cost 48.18 $/year vs 134.55 $/year 2.8x lower annual commercial energy cost
Newer Sep, 2012 vs Oct, 2008 Release date over 3 years later

Benchmarks Real world tests of Core i7 920 vs i3 3225

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 920
143,700 MB/s
Core i3 3225
169,900 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Specifications Full list of technical specs

summary

Core i7 920  vs
i3 3225 
Clock speed 2.66 GHz 3.3 GHz
Cores Quad core Dual core
Socket type
LGA 1366
LGA 1155
Is unlocked No No

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 55W
Annual home energy cost 48.38 $/year 13.25 $/year
Annual commercial energy cost 134.55 $/year 48.18 $/year
Performance per watt 1.21 pt/W 2.97 pt/W
Typical power consumption 135.63W 44.69W

bus

Architecture QPI DMI
Number of links 1 1
Transfer rate 4,800 MT/s 5,000 MT/s

details

Core i7 920  vs
i3 3225 
Architecture x86-64 x86-64
Threads 8 4
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 3 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 45 nm 22 nm
Max CPUs 1 1
Clock multiplier 20 33
Operating temperature Unknown - 67.9°C Unknown - 65.3°C

overclocking

Overclock popularity 491 28
Overclock review score 4.5 1
Overclocked clock speed 4.22 GHz 3.49 GHz
Overclocked clock speed (Water) 4.24 GHz 3.3 GHz
Overclocked clock speed (Air) 4.22 GHz 3.49 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 4000
Number of displays supported N/A 3
GPU clock speed N/A 650 MHz
Turbo clock speed N/A 1,050 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Dual Channel
Supports ECC No No
Maximum bandwidth 25,599.99 MB/s 25,600 MB/s
Intel Core i7 920
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Intel Core i3 3225
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