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post #3801 of 10072
Quote:
Originally Posted by KingT View Post
Maybe the board is not up the task..

Just like CPU's all boards even if they are same modells don't clock equally..

Back in winter of 2008 I had played with DFI LanParty Dark DK-T2RS X48 board and it was stuck @ 470MHz FSB w/ E8400 & KHXPC9200D2/1G RAM which was ridiculous as with same HW (CPU & RAM ) I've hit 550MHz FSB on my P5Q Pro w/ no probl. @ all..

Maybe it was just a bad speciment of mobo..

CHEERS..
That is definitely a possibility. I'm quite content to run a 24/7 clock of 3.6-3.7GHz however so anything more that I squeeze out is for pure enjoyment and fun Has been a great learning experience for me too!
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post #3802 of 10072
I would try lowering the CPU Multiplier then raising the FSB. That would show if it is a FSB wall or not. 3.6 would be either 8x450 or 7x515.
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post #3803 of 10072
So what's the issue ?

I't doesn't POST,it just crashes or it errors in P95 Large FFT/BLEND tests?

Are you going for 4GHz validation or what?

CHEERS..
     
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post #3804 of 10072
Quote:
Originally Posted by KingT View Post
So what's the issue ?

I't doesn't POST,it just crashes or it errors in P95 Large FFT/BLEND tests?

Are you going for 4GHz validation or what?

CHEERS..
Have just been using IBT (There's another thread on here regarding GFlop scores so I'm trying to see how high I can get, testing on High doing 10 runs.) and from 3.75GHz and up it fails within the first 2 runs. I could probably get a 4GHz validation without too much hassle but 3.8GHz stable is my goal. Could post BIOS settings if necessary?

EDIT: Prime 95 Blend test fails within a minute also.
Edited by spiderm0nkey - 11/23/10 at 2:49pm
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post #3805 of 10072
Quote:
Originally Posted by spiderm0nkey View Post
Have just been using IBT (There's another thread on here regarding GFlop scores so I'm trying to see how high I can get, testing on High doing 10 runs.) and from 3.75GHz and up it fails within the first 2 runs. I could probably get a 4GHz validation without too much hassle but 3.8GHz stable is my goal. Could post BIOS settings if necessary?

EDIT: Prime 95 Blend test fails within a minute also.
Just a little left field idea... can your board access the CPU and MCH (NB) skews?

I upped the ones in my BIOS and found i could hit 4 Ghz with a little fiddling.

Previous stable high was 3.92 ghz.

CPU skew = 50 op
MCH skew = 100 op

MIT enclosed:
post #3806 of 10072
Quote:
Originally Posted by Sethy666 View Post
Just a little left field idea... can your board access the CPU and MCH (NB) skews?

I upped the ones in my BIOS and found i could hit 4 Ghz with a little fiddling.

Previous stable high was 3.92 ghz.

CPU skew = 50 op
MCH skew = 100 op

MIT enclosed:
I'm not 100% sure. In my BIOS I see CPU Clock0 Skew : 0 and CPU Clock1 Skew : 0. Not sure if that is the same thing or not.
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post #3807 of 10072
By running IBT you'll never know the reason of instability..

1. Set FSB @ 475MHz

2.Set NB voltage to 1.36V (probably too much as P45 doesn't need more than 1.3V for that freq with C2Q & 4GB RAM but use 1.36V to be sure)

Set MULTI @ 6 to avoid Vcore related problems

4.PLL=1.56V

5.FSB/VTT voltage = 1.35V

6.CPU GTL 0.55x on both lanes (CPU GTL 0/2 & 1/3)

As Intel states default GTL voltage for 45nm CPU is 0.67x 1.1V FSB = 0.737V

So for vFSB of 1.35V you need GTL multi of 0.55 to have that 0.737V real GTL voltage 1.35 x0.55 = ~0.737V

NB GTL=0.58x

Save it and boot..

If sucess. boots in Win then run P95 Large FFT test (@ least 6h but 12h is better)

If some core errors just change CPU GTL (upp it or lower it as it's atrial & error tuning) for that core 0/2 are first & third core and 1/3 are second & fourth core..

When and if you pass P95 then just upp multi to 8 and find enough Vcore for 3.8GHz..

GOOD LUCK..

CHEERS..
Edited by KingT - 11/23/10 at 3:12pm
     
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post #3808 of 10072
Quote:
Originally Posted by KingT View Post
By running IBT you'll never know the reason of instability..

1. Set FSB @ 475MHz

2.Set NB voltage to 1.36V (probably too much as P45 doesn't need more than 1.3V for that freq with C2Q & 4GB RAM but use 1.36V to be sure)

Set MULTI @ 6 to avoid Vcore related problems

4.PLL=1.56V

5.FSB/VTT voltage = 1.35V

6.CPU GTL 0.55x on both lanes (CPU GTL 0/2 & 1/3)

As Intel states default GTL voltage for 45nm CPU is 0.67x 1.1V FSB = 0.737V

So for vFSB of 1.35V you need GTL multi of 0.55 to have that 0.737V real GTL voltage 1.35 x0.55 = ~0.737V

NB GTL=0.58x

Save it and boot..

If sucess. boots in Win then run P95 Large FFT test (@ least 6h but 12h is better)

If some core errors just change CPU GTL for that core 0/2 are first & third core and 1/3 are second & fourth core..

When and if you pass P95 then just upp multi to 8 and find enough Vcore for 3.8GHz..

GOOD LUCK..

CHEERS..
I can do all but the GTL stuff as it doesn't seem to correlate in my BIOS to what you've suggested. Attached is the base txt file for overclocking part of my BIOS, sourced from the Living Review review of my board.
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Viper
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post #3809 of 10072
Quote:
Originally Posted by spiderm0nkey View Post
I'm not 100% sure. In my BIOS I see CPU Clock0 Skew : 0 and CPU Clock1 Skew : 0. Not sure if that is the same thing or not.

Try KingT's suggestions first and see how that goes.

You can have a play with the CPU skews and see it that helps - baby steps when increasing them though.
post #3810 of 10072
That's even better as you can tune GTL voltage for each core separatly..

Just set for all CPU GTL's 0.55x and see if it works..

If it doesn't post just upp those GTL's by 0.02 (eg. 0.57 and so on) and keep doing so untill it boots..

NB GTL leave @ default (or @ auto if that's default)..

CHEERS..
     
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