summary	Athlon II X4 631	A8 3870K
Clock speed	2.6 GHz	3 GHz
Cores	Dual core	Quad core
Socket type
FM1
Is unlocked	No	Yes
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	1.32 pt/W	1.03 pt/W
Typical power consumption	81.25W	N/A

details	Athlon II X4 631	A8 3870K
Architecture	x86-64	x86-64
Threads	4	4
L2 cache	4 MB	4 MB
L2 cache per core	2 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	0.45 - 1.41V	0.45 - 1.41V
Operating temperature	Unknown - 70.1°C	Unknown - 72.7°C
overclocking
Overclock popularity	5	32
Overclocked clock speed	4.03 GHz	3.56 GHz
Overclocked clock speed (Water)	2.6 GHz	3.67 GHz
Overclocked clock speed (Air)	4.03 GHz	3.56 GHz
integrated graphics
GPU	GPU	GPU
Label	AMD Radeon Aug 15, 2011	Radeon™ HD 6550D
memory controller
Memory controller	Built-in	Built-in
Memory type
DDR3-1866
DDR3-1600
DDR3-1333

AMD Athlon II X4 631 vs A8 3870K

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