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Differences What are the advantages of each

Front view of Intel Core i7 870S

Reasons to consider the
Intel Core i7 870S

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More cores 4 vs 2 Twice as many cores; run more applications at once
Front view of Intel Core i5 680

Reasons to consider the
Intel Core i5 680

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Much higher clock speed 3.6 GHz vs 2.66 GHz More than 35% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Lower typical power consumption 59.31W vs 66.63W More than 10% lower typical power consumption
Lower annual home energy cost 17.59 $/year vs 19.75 $/year More than 10% lower annual home energy cost
Lower annual commercial energy cost 63.95 $/year vs 71.83 $/year More than 10% lower annual commercial energy cost

Benchmarks Real world tests of Core i7 870S vs i5 680

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 870S  vs
i5 680 
Clock speed 2.66 GHz 3.6 GHz
Turbo clock speed 3.6 GHz 3.86 GHz
Cores Quad core Dual core
Socket type
LGA 1156
Is unlocked No No

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Maximum bandwidth 21,333.32 MB/s 21,333.32 MB/s
Maximum memory size 16,384 MB 16,998.4 MB

details

Core i7 870S  vs
i5 680 
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 4 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 32 nm
Transistor count 774,000,000 382,000,000
Max CPUs 1 1
Clock multiplier 20 27
Voltage range 0.65 - 1.4V 0.65 - 1.4V

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
Number of displays supported N/A 2
GPU clock speed N/A 733 MHz

power consumption

TDP 82W 73W
Annual home energy cost 19.75 $/year 17.59 $/year
Annual commercial energy cost 71.83 $/year 63.95 $/year
Performance per watt 2.16 pt/W 10.08 pt/W
Typical power consumption 66.63W 59.31W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 2,500 MT/s 2,500 MT/s
Intel Core i7 870S
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Intel Core i5 680
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