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post #81 of 560
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Quote:
Originally Posted by DoctorNick View Post
Haha yeah..

Was 1.32 with bclk 191 x 21 Now i try with 1.34 for 200 bclk.. 1.328 vcore
Hmm..maybe I'll try using a higher vtt than vcore next time.

I enabled speedstep and c state 1 for the summer. Enabling all the c states caused instability, but I think it's stable now with just c state 1. Idling 31C-38C. Still can't get the multiplier to drop, and I can't use those features unless I'm using a x22 multiplier or lower.

Does anybody else have one core that is a lot hotter than the rest? My core #1 is 3-5C hotter than #3 and #4, and core #2 is 10C cooler than #1. (Ultra 120 is already lapped)
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post #82 of 560
Quote:
Originally Posted by Ghostleader View Post

Those are settings for the 870 and not 875K?

Nevermind, I see the ones above your post. Hmm.. going to need more tweaking.

I tried 1.35v vcore and 1.3v VTT for 133x31 and can't get it stable. Might require more vcore but the vdroop disable option pushes vcore in Windows to 1,4v already and temps are maxed.


@cory: Try a remount. I had around 5-7C difference under LinX load. Reseated and now differences are only 2-4C.
Edited by Blizzie - 6/19/10 at 2:14pm
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post #83 of 560
Meh my 875k isnt the best ocer. Failed at 14 hours of prime blend. 20x200. 1.28 IMC/VTT and 1.32 vcore is what I am trying now.
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post #84 of 560
After tweaking for the whole day, I'm confused. I can do 4.0 GHz at 1.28v but even at 1.4v I cannot get 4.1 GHz stable more than 4 passes in LinX.

VTT is 1.25v. RAM is stock

Any ideas?
Edited by Blizzie - 6/19/10 at 6:40pm
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post #85 of 560
Try VTT 1.35v-1.375. I'm using 1.375 for my 4.2Ghz OC. Might have to up that PLL too.

I know they're different chips. Just ordered the 875K today though, hope it turns out well.
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post #86 of 560
Quote:
Originally Posted by R00ST3R View Post
Try VTT 1.35v-1.375. I'm using 1.375 for my 4.2Ghz OC. Might have to up that PLL too.

I know they're different chips. Just ordered the 875K today though, hope it turns out well.
1.8v PLL.

My 860 needed 1.34v vcore and 1.35v VTT to do 4.0 GHz.

I tried to up VTT but it caused strange issues. Seemed like when I boot into Windows it says the clock speed is correct but running LinX the settings wouldn't hold.
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Halcyon.Redefined
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post #87 of 560
Quote:
Originally Posted by Blizzie View Post
1.8v PLL.

My 860 needed 1.34v vcore and 1.35v VTT to do 4.0 GHz.

I tried to up VTT but it caused strange issues. Seemed like when I boot into Windows it says the clock speed is correct but running LinX the settings wouldn't hold.
Well shoot. Look's like I'll get to wrestle with it next week. I'm gonna put the hurt on it and try for 4.3-4.4 stable, if I can keep it cool enough.
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post #88 of 560
I have a corsair Memory Speed MHz: 1333MHz instead of the usual 1600 MHZ most people have. Will this limit my oc ability?
post #89 of 560
Quote:
Originally Posted by idk12 View Post
I have a corsair Memory Speed MHz: 1333MHz instead of the usual 1600 MHZ most people have. Will this limit my oc ability?
It depends what ratio you use and what kind of overclock you want -- so, yes and no.
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Halcyon.Redefined
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post #90 of 560
Quote:
Originally Posted by Blizzie View Post
It depends what ratio you use and what kind of overclock you want -- so, yes and no.
You think it is possible to oc this cpu to 4 ghz with this memory.
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