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Differences What are the advantages of each

Front view of Intel Core i5 650

Reasons to consider the
Intel Core i5 650

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Much better performance per watt 4.67 pt/W vs 1.03 pt/W More than 4.5x better performance per watt
Higher clock speed 3.2 GHz vs 3 GHz More than 5% higher clock speed
Much better overclocked clock speed (Air) 4.31 GHz vs 3.56 GHz More than 20% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 5.08 GHz vs 3.67 GHz Around 40% better overclocked clock speed (Water)
Much lower annual commercial energy cost 96.89 $/year vs 138.41 $/year Around 30% lower annual commercial energy cost
Lower annual home energy cost 37.54 $/year vs 40.03 $/year More than 5% lower annual home energy cost
Front view of AMD A8 3870K

Reasons to consider the
AMD A8 3870K

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Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
More cores 4 vs 2 Twice as many cores; run more applications at once
Supports more RAM 32,768 MB vs 16,773.12 MB Supports more than 95% more RAM
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Newer Dec, 2011 vs Jan, 2010 Release date over 1 years later

Benchmarks Real world tests of Core i5 650 vs A8 3870K

PCMark 8 Home 3.0 Accelerated Data courtesy FutureMark

Core i5 650
1,826
A8 3870K
2,346

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i5 650
4,709
A8 3870K
5,602

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i5 650
2,168
A8 3870K
1,597

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i5 650
1,550,000 MB/s
A8 3870K
126,200 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core i5 650
4,675
A8 3870K
5,339

GeekBench (64-bit) Data courtesy Primate Labs

Core i5 650
4,902
A8 3870K
7,554

PassMark Data courtesy Passmark

Core i5 650
3,116
A8 3870K
3,596

PassMark (Single Core)

Core i5 650
1,319
A8 3870K
1,032

Specifications Full list of technical specs

summary

Core i5 650  vs
A8 3870K 
Clock speed 3.2 GHz 3 GHz
Cores Dual core Quad core
Socket type
LGA 1156
FM1
Is unlocked No Yes

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
AMD64
SSE4.1
SSE4.2
AMD-V
3DNow!
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 73W 100W
Annual home energy cost 37.54 $/year 40.03 $/year
Annual commercial energy cost 96.89 $/year 138.41 $/year
Performance per watt 4.67 pt/W 1.03 pt/W
Idle power consumption 69.1W 47W
Peak power consumption 110.6W 158W
Typical power consumption 100.22W N/A

bus

Architecture DMI FSB
Number of links 1 4
Transfer rate 2,500 MT/s 3,200 MT/s

details

Core i5 650  vs
A8 3870K 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 4 MB
L2 cache per core 0.5 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Transistor count 382,000,000 1,178,000,000
Max CPUs 1 1
Clock multiplier 24 30
Voltage range 0.65 - 1.4V 0.45 - 1.41V
Operating temperature Unknown - 72.6°C Unknown - 72.7°C

overclocking

Overclock popularity 21 32
Overclocked clock speed 4.31 GHz 3.56 GHz
Overclocked clock speed (Water) 5.08 GHz 3.67 GHz
Overclocked clock speed (Air) 4.31 GHz 3.56 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics Radeon™ HD 6550D
Number of displays supported 2 2
GPU clock speed 733 MHz 600 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Maximum bandwidth 21,333.32 MB/s 29,866.66 MB/s
Maximum memory size 16,773.12 MB 32,768 MB
Intel Core i5 650
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AMD A8 3870K
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