summary	Athlon II X4 651	A8 3870K
Clock speed	3 GHz	3 GHz
Cores	Quad core	Quad core
Socket type
FM1
features
Has a NX bit	Yes	Yes
Has virtualization support	Yes	Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
AMD64
AMD-V
3DNow!
Supports dynamic frequency scaling	Yes	Yes
power consumption
TDP	100W	100W
Annual home energy cost	24.09 $/year	40.03 $/year
Annual commercial energy cost	87.6 $/year	138.41 $/year
Performance per watt	1.51 pt/W	1.03 pt/W
Typical power consumption	81.25W	N/A

details	Athlon II X4 651	A8 3870K
Architecture	x86-64	x86-64
Threads	4	4
L2 cache	4 MB	4 MB
L2 cache per core	1 MB/core	1 MB/core
Manufacture process	32 nm	32 nm
Transistor count	1,178,000,000	1,178,000,000
Max CPUs	1	1
Die size	228 mm²	228 mm²
Voltage range	0.91 - 1.41V	0.45 - 1.41V
overclocking
Overclocked clock speed	3.41 GHz	3.56 GHz
Overclocked clock speed (Water)	3 GHz	3.67 GHz
Overclocked clock speed (Air)	3.41 GHz	3.56 GHz
integrated graphics
GPU	None	GPU
Label	N/A	Radeon™ HD 6550D
Latest DirectX	N/A	11.0
Number of displays supported	N/A	2
GPU clock speed	N/A	600 MHz
Turbo clock speed	N/A	600 MHz
memory controller
Memory controller	Built-in	Built-in
Memory type
DDR3-1866
DDR3-1600
DDR3-1333

AMD Athlon II X4 651 vs A8 3870K

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