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Setting up and voltage terms for EP45-UD3* - Page 15

post #141 of 282
Quote:
Originally Posted by PapaSmurf View Post
When you run Prime, a hard lock or BSOD (especially the 0x124 BSOD} is usually lack of vcore or vtt, but when one core fails a prime test while the others plug away it is generally a mch or ref voltage. With hyper pi 32m bsod (especially the 0x124 BSOD} or no extract found = more vcore or vtt, and a freeze = dim/ mch voltages.
Ok so after 3 hours of Prime 95, one of my cores failed.
I should bump up CPU reference or MCH core? Both are at 1.36v in BIOS.

(vCore is at 1.406 for 495FSB x8.5 in BIOS)


P.S.
Am I the only one who looks down at the Rig right before starting a torture test and hopes that a loud pop doesn't happen? lol
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post #142 of 282
The long thread is the Gigabyte EP45-UD3 Series Owners Guide. That one has over 19,700 posts in it. This one is a shorter one specific to some of the voltage terms. Both are good, but a lot more people watch the other one.

A lot of people find anything up to about 495 a lot easier to maintain stability than 500 and up. Sometimes changing the SKEWS helps as does working with the

Quote:
you might need some skews... try
cpu skew 50ps
mch skew 100 ps

helps stabilize high fsb other wise youll need crazy amounts of vtt and mch voltages

really only need 50ps for 500 fsb
i like 50/100 some times 100/150

Here's something that 10acjed posted about the Refs that might help.

Quote:
Originally Posted by 10acjed

That sounds your MCH Ref..

For me the best value on the MCH Ref was found when it was stable, adjusted it down 3 and up 3 from default. The results were failed posts, BSOD at windows load, immediate error in prime...

It was stable at auto (760) and then adjusting up 3 to 868 it was stable...

I then increased my FSB and it was stable at a spot it wasn't before...

It is the main reason I always suggest leaving the Ref voltage alone unless its already stable.. Its hard to trouble shoot if your changing more than 1 value. IE MCH Volts & Ref volts..
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post #143 of 282
Thread Starter 
Posting here is fine but like Papa said, "The long thread is the Gigabyte EP45-UD3 Series Owners Guide. That one has over 19,700 posts in it. This one is a shorter one specific to some of the voltage terms. Both are good, but a lot more people watch the other one".

More eye's on that thread means more help.
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post #144 of 282
I found that the ref voltage for me were crucial in getting over a small hump..

Like Papa quoted me above, the testing I did was at a stable OC. I think I was at 3.93GHz with my Ref's at auto and stable. But when I tried to bump it to 4.0 it would always fail a Prime Blend, just one core.... I tried increasing the cpu voltage and vtt voltage with no luck, even going as high as .05v higher..

So I set it at my stable 3.93 and started tinkering with the ref voltages, I found that Auto was fine for my CPU, but the MCH Ref needed a bump of +2 spots.

Basically just because it says (760) ...... Auto doesnt mean its actually setting it to 760mV when at Auto. I found that if I set my Ref to 760mV manually it was no longer stable at my 3.93, but when I started moving it up one spot and testing I found it was more stable each spot til at 868mV I could run a full stress test.
Once I found that setting stable for a 12 hour blend I went back to adjusting my CPU clock, hit 4.0 without any other voltage changes...
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post #145 of 282
i ended up going back to the beginning and setting all my refs and volts to normal and then working up again helped me so they all scaled right as i went higher.

tbh i dont think i would of got past 4.4ghz had i not :/

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post #146 of 282
Bump and can't believe I didn't sub to this before?! Can't wait to be home from work in about 3 hours and push my q9550 4.2 and beyond.

Hard freezes in LinX, first core failing in prime... sounds like its time to play with some reference numbers
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post #147 of 282
Thread Starter 
Quote:
Originally Posted by marsey99 View Post
i ended up going back to the beginning and setting all my refs and volts to normal and then working up again helped me so they all scaled right as i went higher.

tbh i dont think i would of got past 4.4ghz had i not :/

That is super great for a Q9550 marsey. One word "WOW".
Quote:
Originally Posted by DaClownie View Post
Bump and can't believe I didn't sub to this before?! Can't wait to be home from work in about 3 hours and push my q9550 4.2 and beyond.

Hard freezes in LinX, first core failing in prime... sounds like its time to play with some reference numbers
Almost forgot abut this thread. Depending on how much you play with that chip Dan, it should do 4.3-4.4 with some work.
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post #148 of 282
Quote:
Originally Posted by DaClownie View Post
Bump and can't believe I didn't sub to this before?! Can't wait to be home from work in about 3 hours and push my q9550 4.2 and beyond.

Hard freezes in LinX, first core failing in prime... sounds like its time to play with some reference numbers
When you run Prime, a hard lock or BSOD (especially the 0x124 BSOD} is usually lack of vcore or vtt, but when one core fails a prime test while the others plug away it is generally a mch or ref voltage. With hyper pi 32m bsod (especially the 0x124 BSOD} or no extract found = more vcore or vtt, and a freeze = dim/ mch voltages. Not sure about Linx.
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post #149 of 282
Quote:
Originally Posted by PapaSmurf View Post
When you run Prime, a hard lock or BSOD (especially the 0x124 BSOD} is usually lack of vcore or vtt, but when one core fails a prime test while the others plug away it is generally a mch or ref voltage. With hyper pi 32m bsod (especially the 0x124 BSOD} or no extract found = more vcore or vtt, and a freeze = dim/ mch voltages. Not sure about Linx.
I'll modify my testing software. I was using LinX because of the massive temps it gives compared to Prime95. In most scenarios, I never found my E8400 to go above the temps in Prime95... then I got BC2 and it would give me 5C higher temps than Prime95 would, and i had some stability issues. LinX is giving me temps of 61C where Prime doesn't put me over 48C... Not sure why the difference but it is what it is.

Now, onto my questions... Which testing methods should I use for Prime95? Small FFTs is for CPU only testing really (RAM should be fine, its rated for 1066mhz and I had it booting right around there on my E8400 @4.8GHz suicide ) So I'm looking to do some Small FFTs and watch how it reacts and adapt my voltages from there?

I boot into Windows perfectly fine at 4.2GHz. Most stable setting on the MCH Ref is .760 (stock setting?) before readjusting my term up to 1.36. Term of 1.36 Ref of .760 (I think It scaled to like .881) made it through about 5 minutes of LinX testing and then a failed test. One notch up on MCH ref (.800?) and then running LinX failed in 17 seconds, one notch down got a hard lock if I remember correctly...

I'll run some Prime95 at 4.2 and see what she does and report again though so we're talking apples to apples... Can't wait to see what this chip can do... I think I'll be able to get some nice speeds out of her.
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post #150 of 282
Thread Starter 
Might want to try skews as well.
I can't remember what I use and I am getting ready for work but they may help.
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