AMD Athlon II X4 651K 

Released January, 2012
  • 3 GHz
  • Quad core
  • Unlocked

Features Key features of the AMD Athlon II X4 651K

clock speed

Athlon II X4 651K
3 GHz
A8 3870K
3 GHz

L2 cache

Athlon II X4 651K
4 MB
A8 3870K
4 MB

overclocked clock speed (air)

Athlon II X4 651K
3.43 GHz
A8 3870K
3.56 GHz
Athlon II X4 651
3.41 GHz

overclocked clock speed (water)

Athlon II X4 651K
3.49 GHz
A8 3870K
3.67 GHz


Athlon II X4 651K
A8 3870K

Specifications Full list of technical specs


Clock speed 3 GHz
Turbo clock speed None
Cores Quad core
Socket type FM1
Is unlocked Yes


Has a NX bit Yes
Has virtualization support Yes
Instruction set extensions
  1. 3DNow!
  2. AMD-V
  3. AMD64
  4. MMX
  5. SSE
  6. SSE2
  7. SSE3
  8. SSE4a
Supports dynamic frequency scaling Yes

power consumption

TDP 100W
Annual home energy cost 24.09 $/year
Annual commercial energy cost 87.6 $/year
Typical power consumption 81.25W

memory controller

Memory controller Built-in
Memory type DDR3-1866


Architecture x86-64
Threads 4 threads
L2 cache 4 MB
L2 cache per core 1 MB/core
Manufacture process 32 nm
Transistor count 1,178,000,000
Max CPUs 1
Die size 228 mm²
Voltage range 0.91 - 1.41V


Overclock popularity 1
Overclocked clock speed 3.43 GHz
Overclocked clock speed (Water) 3.49 GHz
Overclocked clock speed (Air) 3.43 GHz

integrated graphics

GPU None
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