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980X is grouchy... Evaluate my OC? - Page 2

post #11 of 14
Thread Starter 
Sorry for the double post:

Been doing a bit more research on differential amplitude... I have mine set at 1000 thinking, quite naively, that more was better.

Turns out that it can be a bit TOO much. Differential amplitude is supposed to help reduce "noise" inherent with higher clocks (by my limited understanding). It makes the CPU less prone to "distraction." Problem is, that too MUCH amplitude (like 1000mv) could in fact be too MUCH and create noise of its own. Clearly I need to adjust this between 8-900...Judging by my instability right now I'm sure it isn't helping!
DireWolf
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DireWolf
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post #12 of 14
Thread Starter 
Okay, well contrary to what we thought it was not in fact 124 errors but instead 101s. No rep for you! (kidding)

I think it helped that I backed out of my bclock OC and started depending only on the multiplier. (33x133).

Okay so once all the speed stepping, throttling and other nonsense is disabled... differential amplitude is at 900 now and I researched skew but it looks like that's more pertinent with higher 200+ bclock adjustments.

NB and SB settings are still on auto- because again I'm not doing a lot of funny business with the QPI... I'm still researching pll a little bit but I don't know enough to just go start changing it for sport. Opinions?

Current settings that are 95% stable on everything except folding are

vcore: 1.418
QPI/DRAM: 1.35
RAM: 1600 @ 1.65

Temps following hours of bigadv / 100% cpu use are still high 50s.

The 980 DOES take some of the fun out of finer tweaking... but 4.4 definitely brings you to that zone where it seems the margin for error plummets and it becomes very uncooperative.
DireWolf
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DireWolf
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post #13 of 14
I have found, as many, that lower PLL helps (1.8 or lower). However, bit-tech.net has always been big on upping PLL (1.9-2.0 range) and seems to get good clocks this way, so it can go either way. I would try lower PLL and higher qpi to see if that will help you go further. What batch are you?
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Big Dog
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post #14 of 14
Wow, I would have bet money it was going to be a 124. how many notches did you bump your vcore up?

How many ibt passes did it take to fail?

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