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Gigabyte EP45-UD3 Series Owners Guide - Page 32

post #311 of 21187
With 65nm, just leave llc enable and vdroop is no problem, but 45nm, you need to disable this option past 1.4vcore(i think) if you don't want to fry your cpu.
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post #312 of 21187
Quote:
Originally Posted by Ghostleader View Post
As error10 wrote: The datasheet says 1.5V ±5%. So 1.425-1.575V for PLL

and CPU Term default on P45 are 1.20 and min max 1.14 - 1.26.

To be on the safe side you stay within those numbers but for benchmarks you can probably go higher for a short while or if your chip is expendable.
Sadly I need higher then those values to even boot at 4.0Ghz.

I was just seeing how high I could get the FSB to boot into Windows and run a quick Everest memory/cache bench but I would have liked to run it at around 4.0Ghz 24/7 like I was able to on my Abit IP35 Pro. Oh well I guess I will have to settle for 3.6Ghz.

I was able to hit 550Mhz FSB before I clocked it back down.




Edited by Ledge68 - 12/9/08 at 11:22am
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Liberty
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post #313 of 21187
Quote:
Originally Posted by Ledge68 View Post
Sadly I need higher then those values to even boot at 4.0Ghz.

I was just seeing how high I could get the FSB to boot into Windows and run a quick Everest memory/cache bench but I would have liked to run it at around 4.0Ghz 24/7 like I was able to on my Abit IP35 Pro. Oh well I guess I will have to settle for 3.6Ghz.

I was able to hit 550Mhz FSB before I clocked it back down.

You should be able to maintain FSB 500 within the limit and with multi 8 to run 4,0GHz if this board is as good as people say.

Have you tried to set CPU Clock skew to 400 - 500ps and NB Clock skew to 200 - 300ps?

You may have to tweak some with the CPU and MCH Referens as well, I don´t have this board so I really don´t know which value you should set for a dual but there should be some guys in this thread who knows, otherwise you have to try for your self, trail and error.
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post #314 of 21187
Thanks for the info.

No I have not messed with those values as I don't really know what they are for.

This is the first board that has had so many (Too many) extra BIOS settings.

I have been looking for settings that others have posted on this forum and Xtremesystems but, most of them have the newer E0 stepping E8400's and E8500's. I got mine the first day that they were released for sale so it's the C0/M0 version. I am not sure how much of a difference this makes but, I do know that most E0 duals can clock better at lower voltages.

+Rep.
Edited by Ledge68 - 12/9/08 at 12:37pm
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post #315 of 21187
Quote:
Originally Posted by Ghostleader View Post
You should be able to maintain FSB 500 within the limit and with multi 8 to run 4,0GHz if this board is as good as people say.

Have you tried to set CPU Clock skew to 400 - 500ps and NB Clock skew to 200 - 300ps?

You may have to tweak some with the CPU and MCH Referens as well, I don´t have this board so I really don´t know which value you should set for a dual but there should be some guys in this thread who knows, otherwise you have to try for your self, trail and error.

Your the man! I got it to boot fine into Windows at 4.05Ghz with a increase on the MHC reference to 200 and the CPU clock skew to 350.
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post #316 of 21187
I just bought one, anxiously waiting for it to come!!!!
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post #317 of 21187
You all may have seen this, but they put out a DDR3 version of this MB.

http://www.newegg.com/Product/Produc...82E16813128369
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post #318 of 21187
Quote:
Originally Posted by By-Tor View Post
You all may have seen this, but they put out a DDR3 version of this MB.

http://www.newegg.com/Product/Produc...82E16813128369
mmmm... i'm torn lol but at that price, WOW
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post #319 of 21187
Quote:
Originally Posted by Ledge68 View Post
Your the man! I got it to boot fine into Windows at 4.05Ghz with a increase on the MHC reference to 200 and the CPU clock skew to 350.
Happy to help, glad that it worked out.

What seems to happen is the clock advances as you increase the FSB speed, it “drifts†so you have to dial it back, so use a delay ~300 - 500 for CPU Clock Skew and ~100 - 300 for the NB Clock Skew seems to be the best.

For the CPU, higher FSB, more delay

For the NB, higher FSB and higher load (example: 4x1 or 4x2 DIMM), more delay.
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post #320 of 21187
I will continue to try different settings but, I can't help but post my results so far.

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Liberty
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WD 640Black, 74Gb WD Rator & 250Gb Seagate Sony DVD Burnner Windows 7 Ultimate 64bit Sceptre X20WG 20.1 
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