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Guru3D.com » Review » AMD FX 8320E processor review » Page 18

AMD FX 8320E processor review - Overclocking With AMD FX

by Hilbert Hagedoorn on: 12/23/2014 10:19 AM [ 4] 40 comment(s)

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Overclocking

The fun news about the FX series processors is that they will all come unlocked. That means the CPU multiplier is unlocked allowing you to easily gain a little extra performance. Overclocking wise you could use AMD OverDrive, but a true guru does his magic in the BIOS. With the new Turbo states you could alter the Max core but for ease of use you could simply disable the Turbo mode altogether if you want a constant overclock on all eight cores.

 

We got the processor running at 4600 MHz on all eight cores with nothing other than a simple heatpipe cooler. This is roughly what all current FX processors reach.

Some generic overclocking guidelines in the BIOS:

  • Set CPU voltage anywhere from 1.4V to 1.55V (make sure you have enough cooling!)
  • Set DDR memory voltage 0.10V higher for increased stability. E.g. 1.55V would be 1.65V
  • Increase the base multiplier towards your preference e.g. 200 x a MP of 23 is 4600 MHz

Again, make sure you have cooled your CPU and motherboard well. Don't skimp on cheap thermal paste. We now incrementally increase the CPU base multiplier and end up at a bus speed of 200 x 23 multiplier - 4600 MHz. To achieve this we needed 1.488 Volts on the processor. At this voltage level in combo with eight cores, the air based cooler was able to keep the CPU cores at roughly 60 Degrees C. If, during this overclock, your system shuts down, that's a new protection from AMD. You've reached either the heat, TDP or OCP limit (this seems to happen once the CPU pulls more than 26.5A from the 12V CPU rails (8pin and 4pin connectors). If that happens decrease the voltage a bit. 

The power draw however is intense as at this stage we consume roughly 350 Watts (entire PC) when stressing all eight CPU cores.




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