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post #3111 of 10702
Thread Starter 
Quote:
Originally Posted by donkrx View Post
more questions..

1) What background services should I disable when running Prime, I've disabled several but I'm not sure about some of the Windows related ones. Can I just run it in Safe Mode lol?

2) I notice that when I run a Blend test, by the time I get to the 1344 FFT, the cores are staggered quite a bit (they are 2 min apart basically). Would that be more stable than all the cores starting right together?

An update for me:

I started running the 1344 FFT in a 15 min cycle (ie the exact same way the blend test runs it) and it seems to be very similar to doing 1 min cycles... it still fails really fast if the settings are wrong. My vcore on load is at the upper end considering the spreadsheet here.

-- My VTT seems to be best between 1.051 and 1.077, not sure which is best yet. It starts to fall off around 1.103... at 1.129 a worker fails, at 1.14 it fails in less than a minute.

-- As for PLL it seems that 1.750 is still the best for me, but I say seems because I'm not sure yet. 1.709 has been kinda meh though.

-- Spread spectrum doesn't seem to have any effect now that I've tried both ways and got better results without it.

This FFT feels so random..... and given that it sounds like its a bit unreliable from others' tests, is it even worth using it (and by that I mean running 25.11 instead)? I mean, what if the 1344 just creates an unrealistic loading scenario that the SB chip tends to mess up on... this particular FFT seems MUCH harder to pass than the rest and requires a lot more voltage, my question is WHY?



Yeah, I still got that in mind, however I failed at the 1344 in the blend test once too. So now I'm running it at a 15 min cycle and finding it does the same thing, failing pretty much 80% of the time.

One thing I wonder is the comment I mentioned above in (2), does the loading in a blend test shift it more gradually or stagger things so that its not as intense. When loading the 1344 FFT in Prime ALONE, I notice my temps spike to what they do under a SMALL FFT. However, when I do the blend test, my temps during 1344 FFT are about 7C less for the entire duration... no spiking. Makes me kinda think, why is that happening?
I tend to disable the LAN and AV and leave the rest, but I have been priming on a different OS altogether, one that has nothig installed apart from a few essential things like mobo drivers, the gpu driver, basically a stripped OS.

Not sure if you can run it in safe mode, but diagnostic mode should work fine I think.

regarding those fft's and prime:

Quote:
Originally Posted by munaim1 View Post
My advise is to everyone if it does work for you then great, but it's not for everyone. People are relying on the those FFT's far too much, forgeting the main objective which is 12hours blend, a cycle through the FFT's.

Im not an expert on prime95, but I would say that they load passes from each FFT gradually and sounds like it does't like you focusing your attention on a particular FFT, especially when you're continously testing it, maybe that's more got to do with the OS rather than prime, I just don't know.

VTT should only be increased if you are overclocking the RAM or have the 4 dimm slots occupied, however increasing it a little can help with stability. It's all about find the sweet spot for YOUR system.

PLL voltage is similar, some have reported raising it helps, other the complete opposite. I have added a section which allows users to bascially share there experience with some of these votlages.

As I said before I'm not an expert on prime95, and don't really want to be or else it will deter me from the main objective, which is getting the system stable rather than finding a way to make it unstable. It's all phsychology bud
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post #3112 of 10702
Quote:
Originally Posted by munaim1 View Post
Disable PLL overvoltage.

EDIT:

If you need it for your overclock then you can't use sleep im afraid. It's one or the other afaik.
damn, yeah turning it off wont even let me into windows, my screen freezes at the windows logo!

oh well, turning off my PC is the only solution, good thing I ordered a SSD coming tomorrow!
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post #3113 of 10702
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Quote:
Originally Posted by doc2142 View Post
damn, yeah turning it off wont even let me into windows, my screen freezes at the windows logo!

Oh well, turning off my pc is the only solution, good thing i ordered a ssd coming tomorrow!
Lol I had a feeling that would happen.
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post #3114 of 10702
Quote:
Originally Posted by munaim1 View Post
I tend to ... ~snip~
Yeah man I know, I know, thanks. I just tend to not give up on things so its taken me a bit of convincing to let it go with those ffts. I got the opportunity to overclock my roommates new i5-2500, I just put him to 4.5 because that was easy and he was satisfied. No bsods for him.

Now if I can just get the AC fixed so I can run this 12h test......
    
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post #3115 of 10702
im gonna go for a 12hr blend tonight, even though its been hit and miss totaly with the 1344 tests...wish me luck!
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post #3116 of 10702
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Quote:
Originally Posted by donkrx View Post
Yeah man I know, I know, thanks. I just tend to not give up on things so its taken me a bit of convincing to let it go with those ffts. I got the opportunity to overclock my roommates new i5-2500, I just put him to 4.5 because that was easy and he was satisfied. No bsods for him.

Now if I can just get the AC fixed so I can run this 12h test......

I am the same, however when things show sign of inconsistency I usually leave them be because no matter what, it's kinda out of your control, especially when it comes to the calculations that prime performs. If it passes 12hours then it's fine




Quote:
Originally Posted by $ilent View Post
im gonna go for a 12hr blend tonight, even though its been hit and miss totaly with the 1344 tests...wish me luck!
Fo sure!! good luck bud
Edited by munaim1 - 8/23/11 at 5:50pm
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post #3117 of 10702
Booted at 4.5Ghz and Vcore 1.3v. Ran blend for a bit. Seems good. Going to do a full run during the day.
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post #3118 of 10702
Quote:
Originally Posted by $ilent View Post
im gonna go for a 12hr blend tonight, even though its been hit and miss totaly with the 1344 tests...wish me luck!
Good luck, dont be too worried, I'm in the same situation as you and still got past 1344 when it came up during the Blend test. We all want a super quick stability test, but that's like having your cake and eating it too.

Let us know what happens, and if you bsod, go check the Prime results.txt to see the last passed FFT. Order goes... 640, 8, 720, 12, 800, 16, 960, 24, 1120, 32, 1200, 48, and then 1344. Not sure after that, I stopped my test today after it got thru 1344. If the last one is 48K then you failed on the 1344K .
    
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post #3119 of 10702
If my room wasn't so small and it wasn't so god damn HOT i'd do this. I get to about 2 hours stable at 4.8 @ 1.44, but after 2 hours I feel like I'm gonna die in my little sauna so I turn my pc off. At 1.5 I did 30 min at 5.0 but I think it was about to catch on fire, so I turned it off. I need WC :/
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post #3120 of 10702
Quote:
Originally Posted by donkrx View Post
Good luck, dont be too worried, I'm in the same situation as you and still got past 1344 when it came up during the Blend test. We all want a super quick stability test, but that's like having your cake and eating it too.

Let us know what happens, and if you bsod, go check the Prime results.txt to see the last passed FFT. Order goes... 640, 8, 720, 12, 800, 16, 960, 24, 1120, 32, 1200, 48, and then 1344. Not sure after that, I stopped my test today after it got thru 1344. If the last one is 48K then you failed on the 1344K .
Where do I find that document?

And also ill be doing the SMALL FFTs, as apposed to large cos i dont wanna test ram?
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