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Differences What are the advantages of each

Front view of Intel Core i5 660

Reasons to consider the
Intel Core i5 660

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Much lower typical power consumption 59.31W vs 100.22W More than 40% lower typical power consumption
Higher clock speed 3.33 GHz vs 3.2 GHz Around 5% higher clock speed
Much lower annual home energy cost 17.59 $/year vs 37.54 $/year 2.1x lower annual home energy cost
Much lower annual commercial energy cost 63.95 $/year vs 96.89 $/year Around 35% lower annual commercial energy cost
Front view of Intel Core i5 650

Reasons to consider the
Intel Core i5 650

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Better overclocked clock speed (Water) 5.08 GHz vs 4.86 GHz Around 5% better overclocked clock speed (Water)

Benchmarks Real world tests of Core i5 660 vs 650

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i5 660
4,943
Core i5 650
4,709

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i5 660
2,268
Core i5 650
2,168

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i5 660
1,640,000 MB/s
Core i5 650
1,550,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core i5 660
4,925
Core i5 650
4,675

GeekBench

Core i5 660
5,664
Core i5 650
6,669

3D Mark 11 (Physics)

Core i5 660
3,280
Core i5 650
3,070

PassMark Data courtesy Passmark

Core i5 660
3,262
Core i5 650
3,116

PassMark (Single Core)

Core i5 660
1,383
Core i5 650
1,319

Specifications Full list of technical specs

summary

Core i5 660  vs
650 
Clock speed 3.33 GHz 3.2 GHz
Turbo clock speed 3.6 GHz 3.46 GHz
Cores Dual 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

power consumption

TDP 73W 73W
Annual home energy cost 17.59 $/year 37.54 $/year
Annual commercial energy cost 63.95 $/year 96.89 $/year
Performance per watt 9.23 pt/W 4.67 pt/W
Typical power consumption 59.31W 100.22W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 2,500 MT/s 2,500 MT/s

details

Core i5 660  vs
650 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 4 MB 4 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Transistor count 382,000,000 382,000,000
Max CPUs 1 1
Clock multiplier 25 24
Voltage range 0.65 - 1.4V 0.65 - 1.4V
Operating temperature Unknown - 72.6°C Unknown - 72.6°C

overclocking

Overclocked clock speed 4.28 GHz 4.31 GHz
Overclocked clock speed (Water) 4.86 GHz 5.08 GHz
Overclocked clock speed (Air) 4.28 GHz 4.31 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics Intel® HD Graphics
Number of displays supported 2 2
GPU clock speed 733 MHz 733 MHz

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 16,773.12 MB 16,773.12 MB
Intel Core i5 660
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Intel Core i5 650
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Comments

Showing 1 comment.
The difference in cost to run these CPUS i5 660 and i5 650 is crazy. i don't see how it ls possible to be that much different with nearly the same specs. the 660 being slightly better performance per watt and at about .5 the cost annually to run than the 650 with the slightly lower specs/ by less than a 10th. its; very weird and I have not been able to find the reason for this anywhere on line. why would Dell choose the 650 over the 660 if it is such a price difference for the customer consumption wise and a Plus, however slight, in performance. ? anyone know> I mean, check this out : Annual home energy cost 660 17.59 $/year 650 37.54 $/year Annual commercial energy cost 660 63.95 $/year 650 96.89 $/year, is this correct? thats 32.94 difference in price to run in 2010! commercial. and 19.95 difference in Home use! 2010. this is even more weird and is true within Cents. the cpus cost about as much as the difference. so literally the 660 would pay for it;s self in 1 year or less.
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