FX8320 Overclock help

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BrandonCSLC

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Nov 18, 2013
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I have the M5A99FX Pro motherboard with a FX8320 CPU

Current Multiplier 19.0
Current CPU Voltage: 1.325v

Yields 4145Mhz clock speed.

How do I know when I have the right amount of voltage?
 
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anti-duck
What sort of cooling do you have by the way?

I couldn't find an overclocking guide per se, but I did find a video going through all the screens of your BIOS though. You want to disable AMD turbo core, manually set CPU bus frequency to 200, PCIE frequency to 100, memory frequency to whatever the speed of your RAM is and adjust DRAM timing control to match your stock memory timings and then set EPU power saving to disabled, go into DIGI+ power control and set CPU load line calibration to 'High' or 'Ultra High', go back and set CPU & NB voltage to manual mode, click advanced and go to CPU configuration and disable cool 'n' quiet, C1E and core C6 state and you're ready to start overclocking :)

I would start by going back to AI tweaker and...
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anti-duck

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If it's your first time, I would take the FSB back to 200MHz (I knew the FSB wasn't at standard clocks but I asked because I expected you to say you'd changed the memory clocks too), do a Prime95 torture test on all threads for atleast 15 minutes, monitor temps and if it's stable, up the mutliplier 1 notch. You also need to disable turbo clocks and all of the power saving features and does your BIOS have any options for LLC?
 
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anti-duck

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What sort of cooling do you have by the way?

I couldn't find an overclocking guide per se, but I did find a video going through all the screens of your BIOS though. You want to disable AMD turbo core, manually set CPU bus frequency to 200, PCIE frequency to 100, memory frequency to whatever the speed of your RAM is and adjust DRAM timing control to match your stock memory timings and then set EPU power saving to disabled, go into DIGI+ power control and set CPU load line calibration to 'High' or 'Ultra High', go back and set CPU & NB voltage to manual mode, click advanced and go to CPU configuration and disable cool 'n' quiet, C1E and core C6 state and you're ready to start overclocking :)

I would start by going back to AI tweaker and manually setting CPU manual voltage to the stock voltage of your processor at its 4GHz boosted state, which is 1.425v and then set your CPU ratio to 20 and boot into Windows, test it with Prime95 for atleast 15 minutes whilst monitoring temps, if 1 or more cores fail, your computer locks up or you get a BSOD, restart back into BIOS and if the temps were ok and you have a lot of headroom, up the voltage to 1.450v and repeat the 15 minute stress test. If it's stable after that small stress test, you can go back into BIOS and up the multiplier by .5 and repeat the stress test.
 
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BrandonCSLC

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Cooling is a Corsair H60.
I found a manual online here: http://sites.amd.com/us/Documents/AMD_FX_Performance_Tuning_Guide.pdf

I didn't use AMD Overdrive because it was tuning my CPU through windows and I was getting weird frequency fluctuations. one second it would be 4100Mhz then it would be 2900Mhz. It would also cause games to freeze. I later found out this was because I had my core voltage too high. Voltage cap seems to be 1.30V to 1.325V. So I went into Bios and followed the "Advanced Tuning" guide in the PDF. I disabled: Cool 'n' Quiet, C1E, SVM, Core C6 State and APM Master Mode along with Turbo Core.
I left the stuff in DIGI + VRM alone and set to "Auto" I figure the motherboard knows better about this stuff than I do. I also left CPU voltage and offset on auto in BIOS.

Next I changed the multiplier from 18.5-19.0. This got me to 3900MHz I ran Prime95 for about 30min and nothing bad happened. CPU temp got to about 55C and stayed there. Went back into BIOS and changed multiplier to 19.5. Now the CPU is at 4000Mhz at 1.296v Ran prime for about 30min again and nothing bad happened again but CPU floated around 57-58C. I stopped there cuz Im tired and going to bed. Will pick this up in the morning. Played about 30 min of Crysis 3 (Why? Only game I have where both GPU's will go to 100% usage.) maxed out with MSAA x 2 and things ran buttery smooth at 60fps @ 1080p with Vsync on. Both GTX770 4GB cards ran at about 70% to 97% and CPU hit about 50% to 70% usage. Used to get these bad FPS drops into the 30's and 40's. Much better game play now in other games too!

Tomorrow I will take it to 4100Mhz and see how it performs. Temps while gaming are in the 30's and 40's. While I sit here typing the CPU is at a cool 25C! :D
 
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anti-duck

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Yeah, I personally always overclock CPU's in BIOS exclusively. Was that 57-58°C core temp or socket temp? An overclock can make an awesome difference, I'm not sure what the 'sweet spot' is for the FX 8320 though.

That is a nice idle temp! :D my FX 6300 @ 4.5GHz 1.425v idles at 22°C.
 
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BrandonCSLC

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Those temps I listed for the torture test were core temps. Socket temps were in the 70's. I think I saw the socket hit 81C at one point. It never gets that high in rigorous gaming though. I think the highest I have seen the socket get while gaming is 55C-60C.

The Corsair H60 has worked really well for me. Some people complain about high temps with the H60 but I dont think they are monitor in the right readings. I use HWinfo.
 
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