AMD Overclocking advice needed! The whole story inside. Please Hel

r0g

r0g

r0g

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hello guys
i new here
I need some expert advice. Here is a little back story. I recently built an AMD setup for video editing.

Full specs:

Antec GX500 Computer Case

Coolermaster 1000W Silent Power PSU

Asrock Fata1ity 990FX Killer Motherboard (Latest Bios Installed)

AMD FX-8320

Coolermaster Hyper212+ With 2 Coolermaster Fans In push/pull

8GB ADATA 1866 DDR3

1GB AMD Radeon 6450 Video Card (I dont game)

240GB Samsung SSD

DVD-RW

I wanted to keep it in a lower budget than getting into the really higher end spectrum of intel. I originally opted for the FX-6300 and a biostar 970 motherboard. Then I did some research and read about how the 970 board that I bought has only a 4 phase power to the cpu, and that can really limit any kind of overclock. I then returned the biostar board and the fx-6300, and went with the Asrock Fata1ity 990FX Killer board (which I thought would be better since it has an 8+2 CPU phase) and an FX 8320. I was reading all over this forum about how the 8320 will usually overclock to 4.2ish on stock voltage, and thought that would be perfect for my needs personally. Everything was all good when assembling, and testing and basically getting it running perfectly 100% stock, before diving into any kind of overclock. I turned off all of the C6/Power saving states, C&Q, AMD power manager whatever option, No Turbo Core, and the RAM was at the stock XMP 1866 profile. So, after some tinkering with either FSB overclocking, or just doing multiplier overclocking, I'm left with the same results basically. I'm not sure if I got a bum CPU, or if the board is limiting anything. I can get it as high as 4.2 basically with 1.45V, and it runs OK until prime95 or OCCT kick it off with an error. The NB was set to 2200 and the HT was 2400 or 2600, with the same results. I even upped the NB voltage. I then thought to just put it to 4Ghz by doing the 20X multiplier and leaving it at 1.4V. It seems to work fine with the exception of every few minutes the multiplier lowers to 7X, and my CPU speed goes down to 1400mhz for literally 2 seconds, before jumping back to 20X at 4000mhz. Is this normal? I watched the voltage and it usually stays around 1.33-1.35V under a full load. The max temps that CoreTemp had shown me even after a full hour of 100% load was 50C, but it usually hovered in the 46C range. But after an hour on OCCT, and I stop the program, I look at the CPU frequency chart, and it shows the CPU dipping down almost all the time. It never just stays at the clock speed or multiplier that I set it at in the bios. I have a 30 day return available and I'm wondering if either of these are defective. I also did a few more hours of reading and read about the asrock board being more geared towards gaming and not so much overclocking. I'm not sure if thats really the case or not, it was just what I had read. Please if you have any advice to help me out here, I would really appreciate it.
 
Do you have LLC enabled in the bios?

The current crop of 8320s seem fairly rich, with 4.5 fairly easily attainable with the right mobo. I'm not familiar with the ASRock, though.
 
Is the Apm (AMD Application power management) mode definitely disabled in the bios, as this is the main throttling feature that protects the vrm's from overheating. Are you able to confirm the temps of the vrm's when under full load, as around 70c-80c the vrm's will throttle unless APM is disabled.
Or try putting a fan over the vrm heatsink area just to test if a thermal issue.

I don't think your board has LLC, which means you're voltage will drop under heavy load. So you'd effectively have to input a higher voltage on idle to compensate for the droop.

Do you know if your fx8320 was manufactured within the last year or so?
As earlier fx's on average suffered more leakage than of recent.
Generally on the refined silicon
1.35v should get you to 4.2-4.4ghz
1.45v 4.5-4.7ghz

Also there is another feature within the bios somewhere called Cpu Thermal Throttle, Maybe have a play with disabling that.

Word of advice don't do long durations of stability testing until you are nearing the final refinement of your voltage and clockspeed vs temperature.

I recommend a 6+2 digi Asus m5a97 evo R2.0 or Gigabyte 970a ud3p/990xa ud3 (but check its the latest rev and not an older version)
I'm more a Gigabyte man myself.

Could you provide a hw monitor screen print of your throttling and temperatures like in this thread?
http://forums.overclockers.co.uk/showthread.php?t=18639472
 
As above ASUS or Gigabyte. I had very good results with an ASUS M5A990X mobo and the 83xx processor.

Long periods on OCCT or prime are not necessary. Just use your normal apps when overclocking although ASUS realbench IS useful for testing.

Note 1000W is slight overkill :) you may be using up to 350W at a push on the above system. Not very efficient.
 
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