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post #4081 of 10701
Quote:
Originally Posted by Arimis5226;15024264 
I have a question concerning vcore fluctuation. With Prime95, I'm noticing a 16mV fluctuation. Is that bad? I'm also curious of what would be acceptable vdroop/vrise before concern should set in?

Maybe setting additional turbo voltage manually to +0.004 will help u to get it more stable...
i get les spikes and in a smaller range...
try it and see for ur self
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Zeus
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post #4082 of 10701
Quote:
Originally Posted by Arimis5226;15011980 
Oh, and where are the sisoftware sandra scores at? I think I may have overlooked any links :/

/bump
post #4083 of 10701
I got a 124 BSoD at 4 1/2 hours of Blend at 4.5GHz with 1.30V Vcore and 1.15V QPI/VTT. Previously, I'd tried it with 1.1V QPI/VTT. What's the most likely problem, needs still more QPI/VTT or needs a bit more Vcore?

I'd just test it out myself, but if it's going to take over 4 hours to find the result, that could prove a bit of a time consuming process.

Also, when it crashed with 1.1V QPI/VTT it was after only just over an hour, is that just a coincidence or has the extra voltage there kept it a bit more stable?
post #4084 of 10701
OCing is a very time consuming process if you want something stable. Don't take short cuts or else your performance will suffer for it.

Raise your CPUv to 1.35 and give it another go. If that passes, knock it down a notch or two and retest.

Keep the 1.1V QPI/VTT.
post #4085 of 10701
Quote:
Originally Posted by SightUp;15025583 
OCing is a very time consuming process if you want something stable. Don't take short cuts or else your performance will suffer for it.

Raise your CPUv to 1.35 and give it another go. If that passes, knock it down a notch or two and retest.

Keep the 1.1V QPI/VTT.
1.35V? I'm going to bump it up one notch at a time.
post #4086 of 10701
Ok, then do it and be prepared to test and test and test... These things take a lot of time.
post #4087 of 10701
Quote:
Originally Posted by SightUp;15025840 
Ok, then do it and be prepared to test and test and test... These things take a lot of time.
But I know that's it's fairly close to stable here (it's 100% stable doing everyday tasks and gaming) so it can't need too much more Vcore. Working down from 1.35V would surely take longer than working up from 1.3V.
post #4088 of 10701
Thread Starter 
Quote:
Originally Posted by Arimis5226;15024487 
/bump

Scroll top of the spreadsheet and select 2600k Bench.


Quote:
Originally Posted by Rops84;15024461 
Maybe setting additional turbo voltage manually to +0.004 will help u to get it more stable...
i get les spikes and in a smaller range...
try it and see for ur self

This apparently helps. I will test it out though. Thanks for the reminder. Just to add, in offset mode, taaking the LLC a notch down (from ultra high to high) kinda helped my vcore fluctuation in while under load, I know get 1.472/1.480v as opposed to ultra high and 1.464/1.472/1.480/1.488. Ultra high worked better for me under manual voltage but not so good when I switched over to offset as you can see by the votlage bouncing around under load.

Quote:
Originally Posted by Ellis;15024576 
I got a 124 BSoD at 4 1/2 hours of Blend at 4.5GHz with 1.30V Vcore and 1.15V QPI/VTT. Previously, I'd tried it with 1.1V QPI/VTT. What's the most likely problem, needs still more QPI/VTT or needs a bit more Vcore?

I'd just test it out myself, but if it's going to take over 4 hours to find the result, that could prove a bit of a time consuming process.

Also, when it crashed with 1.1V QPI/VTT it was after only just over an hour, is that just a coincidence or has the extra voltage there kept it a bit more stable?

I wouldn't increase vcore just yet. Test it again with vtt @ 1.15v just to see it wasn't a fluke. Before you do that, did you work your way up from auto vtt? Unfortunatly it is time consuming and vcore bump may even fix it, however, I see that as a last resort. If you can tweak the voltage accordingly without increasing the vcore and maintain stability then in my book that's complete win!!

Also have you played around with PLL voltage? I recommend testing the vtt first then comes down to PLL voltage.

Which ever vtt value gets the highest duration in prime leave it there and mess around with the pll. Ultimately you could just leave it at 1.15v or continue increasing it until a higher duration of prime and then mess around with PLL voltage if you want. The difference between an hour and 4hours is quite a bit considering no changes have been made to the vcore and you have increased stability. Keep going bud, once you got it right then there would be no reason to mess around with it, that my friend will be a tweaked overclock in one go rather than throwing voltages and hoping for the best.

Hope that helps smile.gif
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post #4089 of 10701
Quote:
Originally Posted by munaim1;15026278 
Scroll top of the spreadsheet and select 2600k Bench.





This apparently helps. I will test it out though. Thanks for the reminder. Just to add, in offset mode, taaking the LLC a notch down (from ultra high to high) kinda helped my vcore fluctuation in while under load, I know get 1.472/1.480v as opposed to ultra high and 1.464/1.472/1.480/1.488. Ultra high worked better for me under manual voltage but not so good when I switched over to offset as you can see by the votlage bouncing around under load.




I wouldn't increase vcore just yet. Test it again with vtt @ 1.15v just to see it wasn't a fluke. Before you do that, did you work your way up from auto vtt? Unfortunatly it is time consuming and vcore bump may even fix it, however, I see that as a last resort. If you can tweak the voltage accordingly without increasing the vcore and maintain stability then in my book that's complete win!!

Also have you played around with PLL voltage? I recommend testing the vtt first then comes down to PLL voltage.

Which ever vtt value gets the highest duration in prime leave it there and mess around with the pll. Ultimately you could just leave it at 1.15v or continue increasing it until a higher duration of prime and then mess around with PLL voltage if you want. The difference between an hour and 4hours is quite a bit considering no changes have been made to the vcore and you have increased stability. Keep going bud, once you got it right then there would be no reason to mess around with it, that my friend will be a tweaked overclock in one go rather than throwing voltages and hoping for the best.

Hope that helps smile.gif
I haven't changed the PLL voltage at all since I set it to 1.7V at some point.

Also, something I remembered quite recently was that when I tested with 1.1V VTT I used 1792 FFTs (which is when it lasted 1 hour), and when I increased the VTT to 1.15V I was going out for several hours, so I thought I'd just use Blend. That's when it lasted for 4 hours. Not sure if there's a difference there.

Anyway, I'll test again with the same settings tonight, and see what happens. If it's crashed by the time I wake up I'll increase the VTT a little bit and try again whilst I'm at college.
post #4090 of 10701
stableh.png

Add me please? wink.gif
Edited by $ilent - 9/22/11 at 10:25am
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