** Official ** Gigabyte UD3 P45 Series -- EP45-UD3 / EP45-UD3R / EP45-UD3P

[bluestang]

I have been following this thread from the beginning and having trouble with stability at 8x533 on a UD3R. I really don't want to use ET6, so can anyone who is running an E8500 on a UD3R at 8x533 w/mem at 1:1 and NOT using ET6 but just tweaking in BIOS please post your BIOS settings. It would be greatly appreciated. Thanks!

GA-EP45-UD3R F5 BIOS
E8500@3.8 400x9.5 @ 1.25V
2x2 DDR2-1066 Dominators w/Fan 2.1V v1.1
MSI HD4670
Seagate 400GB SATAII
Coolermaster CM690 3x120mm
Coolermaster Real Power Pro 550
Zerotherm Zen Z120 @ 1800rpm

[radaja]

bluestang,i dont think many people here are using ET6 for thier OC's.but just post the screenshots of ET6 to help others with thier OC's(to see the settings)most do it through bios.

[bluestang]

But ET6 shows different values than BIOS...no?

[fatguy1992]

For me, all the references in ET6 are wrong.

[BuGjAE]

bluestang,i dont think many people here are using ET6 for thier OC's.but just post the screenshots of ET6 to help others with thier OC's(to see the settings)most do it through bios.

I'm using ET6 for sometime that I won't restart because ....lazy, but I don't get any precision stable from this.
Anyone have tested F7b ,I testing over 8 Hrs Orthos Blend around 520x8.5 still get freezingafter 8 Hrs. :O

[systemviper]

3rd WR for my Q9650

and still have antifreeze to go.....

comming to get you toooooooo with the igloo

[Lsdmeasap]

For me, All the references in ET6 are wrong or always show the same defaults. Why is this?

That is ONLY because ET Shows the .xx % of Vtt of what you set in the BIOS. The Default Value of MCH Ref is .63% of Vtt at stock of 1.20V, which is .756 (.76) . The reflected value in the BIOS and Easytune MCH Ref % is also always x Stock Vtt, so don't let what you see as you change Vtt back to what you want to use throw you off.

Why is this important? I feel that the default of .76 is to much, especially for a overclocked system when trying to gain stability. I believe between .68-.72 is often best. Of course more or less may be needed depending on your board, your ram, your overall speeds, and other voltage settings.

The Ref Settings in the BIOS are .xx % values of/X Stock Vtt so this tends to throw off many users when they set something and then compare to EasyTune. So you need to keep the % amounts in mind when changing these Ref voltages, and it is easiest to do it at stock Vtt (unless you need a % Value Stock Vtt will not allow you to choose, if so adjust accordingly) and then raise your Vtt back up to where you want to run it. If you Make any deviation from the stock % for MCH Ref of .63% the value will be reflected in ET

EasyTune ________ Actual % Of Stock Vtt
.76 _____________________ .63
.75 _____________________
.745 ____________________ .621
.73 _____________________ .61
.72 _____________________
.715 ____________________ .5977
.70 _____________________ .585
.69 _____________________
.685 ____________________ .575

Here is Five Common examples of this, all using MCH Ref, and various Vtt (Termination) voltages with images showing how each % is possible. All of these but the last WILL Change what you see for MCH Ref in EasyTune as well. This way I hope you can see how this works, and then maybe better find your way to tuning your Ref voltages

*** Examples below are percentages ranging between 57.5% - 63% (.685V - .76V) with Vtt always at 1.28V ***


Those ranges .685-.76 are actual values of 57.5%-63% of stock Vtt, varying off from the .76 (63%) stock setting. Some Percentage values will be rounded off for simplicity.


(MCH Ref .685% AKA .685 in ET **57.5% Actual**)



This example shows if you set 1.20 Vtt and then set your MCH Ref to .685 and then raise Vtt back to 1.28, ET would show .685 MCH Ref as .7350V would be .685% of Vtt (1.28 x .5745 = .735) ~ Stock Vtt 1.20 x .5745 = 6894% of stock Vtt (Thus .685%)


(MCH Ref .70% AKA .70 in ET **58.5% Actual**)



This example shows if you set 1.20 Vtt and then set your MCH Ref to .70 and then raise Vtt back to 1.28, ET would show .70 MCH Ref as .75008V would be .70% of Vtt (1.28 x .586 = .75008) ~ Stock Vtt 1.20 x .586 = .7032% (Thus .70%)

(MCH Ref .715% AKA .715 in ET **59.5%-60% Actual**)



This example shows if you set 1.20 Vtt and then set your MCH Ref to .715 and then raise Vtt back to 1.28, ET would show .715 MCH Ref as .765V would be .715% of Vtt (1.28 x .5977 = .7650) ~ Stock Vtt 1.20 x .5997 = .7172% of stock Vtt (Thus .715%)

(MCH Ref .73% AKA .73 in ET **61% Actual**)



This example shows if you set 1.20 Vtt and then set your MCH Ref to .73 and then raise Vtt back to 1.28, ET would show .73 MCH Ref as .780V would be .73% of Vtt (1.28 x .61 = .7808) ~ Stock Vtt 1.20 x .61 = .732% of stock Vtt (Thus .73%)

(MCH Ref .745% AKA .745 in ET **62% Actual**)



This example shows if you set 1.20 Vtt and then set your MCH Ref to .xx and then raise Vtt back to 1.28, ET would show .745 MCH Ref as .7948V would be .745% of Vtt (1.28 x .621 = .79488) ~ Stock Vtt 1.20 x .621 = .745% of stock Vtt (Thus .745%)


*** STOCK MCH Ref values at .63% (.76V) To show how ET seems to often or always show .76 and confuse users ***


First Example shows stock values for Ref used, .63%. That would be MCH Ref manually set but Value unchanged (.76) and then Vtt Raised to 1.28.

(Stock MCH Ref W/ 1.28 Vtt / .76 in ET **63% Actual**)



This example shows if you set 1.20 Vtt and then manually set your MCH Ref to .756 and then raise Vtt to 1.28, ET would show .76 MCH Ref as .810V would be .76% of Vtt (1.28 x .633 = .81024) ~ Stock Vtt 1.20 x .63 = .756% of stock Vtt (Thus .63%)

This following example shows Stock Vtt and Stock MCH Ref used.........

(Stock MCH Ref W/1.20 Vtt or .76 in ET **63% Actual**)



This example shows if you set 1.20 Vtt and then manually set your MCH Ref to .756, ET would show .76 MCH Ref as .756V would be .76% of Vtt (1.20 x .63 = .756) ~ Stock Vtt 1.20 x .63 = .756% of stock Vtt (Thus .63%)


That is just ONE example, and how to manipulate it, of the Many Ref Voltages in the BIOS Vs. what you see in Easytune. Here are all the values affected by other Values in the BIOS and their respective default percentages.

CPU Termination (Vtt) Automatically changes the following if manually set >>>

CPU Reference Voltage (.63% of Default Vtt/1.20) .76 ET
CPU Reference2 Voltage (.67% of Default Vtt/1.20) .80 ET
MCH Reference Voltage (.63% of Default Vtt/1.20) .76 ET

DRAM Voltage Automatically changes the following if manually set >>>

MCH/DRAM Reference Voltage (.50% of Default Dram Voltage)
DRAM Termination Voltage (.50% of Default Dram Voltage)
Channel A Reference Voltage (.50% of Default Dram Voltage)
Channel B Reference Voltage (.50% of Default Dram Voltage)

If you want a higher or lower than stock % / Value for any of the above settings you will find it easier to set the Dram Voltage or Vtt back to stock (Or above or below to find and be able to choose alternate % Values), then adjust desired setting to the % / Value you wish to use.

Then once you have selected a % range you want to use for said setting then go back and raise your Vtt or Dram Voltage back to what you choose to use and the corresponding settings will self adjust and still be set to the .xx % amount that you set them to.

[fatguy1992]

Thanks that clears up some questions .

So for my 65nm quad, the CPU reference should be .67 or 67% and the MCH should be the same?

Thats what I was told a while ago - just checking.

[Lsdmeasap]

I am not sure if CPU Ref is set by the board or the CPU, but I think it is the board.

Or did you mean what value you should use as a starting point, either way I am not sure for either what you "Should" use.

As for what you should use Vs. What works for you, I think what works for you is what you really should try to get going. All boards act differently even with the same hardware in them, so what works for one user may not work at all for another user. But, sorry I am not sure what you should use as a starting point for either other then going from stock and adjusting from there.

Some find MCH .68-.73% best, others less/more, all up to your setup and board.

You can check what your defaults are by setting things all to stock and then looking in EasyTune.

As for CPU Ref, Some boards have both (CPU Ref 1+2), and some do not. So as you see I posted here boards without would have one value locked at .67% >>>
http://www.overclock.net/intel-mothe...ml#post5235173

[fatguy1992]

What i meant is:

My VTT is 1.3v and MCH is 1.3v.

Therefore I set a 0.863 reference.

0.863/1.3 = 0.6638 and so on. Which rounds to 0.67 or 67%.

So is that right.

[Lsdmeasap]

.871 would be .67 or 67% of 1.3 Vtt

So you should set Vtt back to 1.20 then adjust whichever ref you meant to .67% (.87) and then raise the Vtt back up to 1.3 and it will be the correct value. That of course is if you cannot already set .871

If you cannot get .871 exact and you want it, you will need to adjust Vtt up or down until you can select that amount on the ref you wish to set to .67

[fatguy1992]

I can't set 0.871 and 0.863 is the closest and it works.

I just wanted to check that aiming for 67% is the right thing to do.

[pangingIII]

That is ONLY because ET Shows the .xx % of Vtt of what you set in the BIOS. The Default Value of MCH Ref is .63% of Vtt at stock of 1.20V, which is .756 (.76)

The Ref Settings in the BIOS are .xx % values of/X Vtt so this tends to throw off many users when they set something and then compare to EasyTune. So you need to keep the % amounts in mind when changing these Ref voltages, and it is easiest to do it at stock Vtt and then raise your Vtt back up to where you want to run it. If you Make any deviation from the stock % for MCH Ref of .63% the value will be reflected in ET

Here is Four Common examples of this, all using MCH Ref, and 1.30 Vtt (Termination). All of these but the last WILL Change what you see for MCH Ref in EasyTune as well. This way I hope you can see how this works, and then maybe better find your way to tuning your Ref voltages

*** Examples Below using 1.3 Vtt ***

(MCH Ref .68% AKA .68 in ET)
For example if you set 1.3 Vtt and .884 MCH Ref, ET would show .68 MCH Ref as .884 would be .68% of Vtt.

(MCH Ref .70% AKA .70 in ET)
Another example if you set 1.3 Vtt and .91 MCH Ref, ET would show .70 MCH Ref as .91 would be .70% of Vtt

(MCH Ref .72% AKA .72 in ET)
Another example if you set 1.3 Vtt and .936 MCH Ref, ET would show .72 MCH Ref as .936 would be .72% of Vtt

STOCK MCH Ref VALUES at .63% (To Help show how ET Seems to always show .76 for users)

First Example shows stock values for Ref used, .63%. That would be MCH Ref manually set but Value unchanged (.76) and then Vtt Raised to 1.3, or manually set to .819 and Vtt Manually set to 1.3..........

(Stock MCH Ref W/ 1.3 Vtt / .76 in ET)
If you set 1.3 Vtt and .819 MCH Ref ET would show .76 MCH Ref as .819 would be .63% of Vtt

This Example shows Stock Vtt and Stock MCH Ref used.........

(Stock MCH Ref W/1.20 Vtt or .76 in ET)
If you set 1.2 Vtt and .756 MCH Ref ET would show .76 MCH Ref as .756 would be .63% of Vtt.


That is just ONE example, and how to manipulate it, of the Many Ref Voltages in the BIOS Vs. what you see in Easytune.

Here are all the values affected by other Values in the BIOS and their respective Percentages.

CPU Termination (Vtt) Automatically changes the following if manually set >>>

CPU Reference Voltage (.63% of Default Vtt/1.20)
CPU Reference2 Voltage (.67% of Default Vtt/1.20)
MCH Reference Voltage (.63% of Default Vtt/1.20)

DRAM Voltage Automatically changes the following if manually set >>>

MCH/DRAM Reference Voltage (.50% of Default Dram Voltage)
DRAM Termination Voltage (.50% of Default Dram Voltage)
Channel A Reference Voltage (.50% of Default Dram Voltage)
Channel B Reference Voltage (.50% of Default Dram Voltage)

If you want a higher or lower than stock % / Value for any of the above settings you will find it easier to set the Dram Voltage or Vtt back to stock (Or above or below to find and be able to choose alternate % Values), then adjust desired setting to the % / Value you wish to use.

Then once you have selected a % range you want to use for said setting then go back and raise your Vtt or Dram Voltage back to what you choose to use and the corresponding settings will self adjust and still be set to the .xx % amount that you set them to.

there were some misunderstanding about voltage values in ET6 when these boards first released and that were reviewed by users on the net and then stated that ET6 software had some kind of a bug and some of voltage values were wrong or something.
it's about time someone take the time to write and explain about the BIOS vs. ET6 voltage values and all that with an easy to understand english.
i can now use the post as a ref instead of keep repeating myself on these voltage setting stuff and never sure that any readers would understand.

[Lsdmeasap]

Glad I could be of some help! I have been trying to post this around a few places to help others out!

I posted it here a time or two, but only a small part of it. I just made out the examples tonight as I seen what I had previously posted still left some users a bit confused.

I do think it should be handled a little better in the BIOS Vs. EasyTune but at least now I know for sure what is what and how to manipulate it

Hope this helps many users, as I know this can be a very tricky subject

[1nsane]

Here r my new low volt settings for 520Mhz fsb.
I'll try more when my new reaper will arive.
Vcore has been adjusted in a 2nd test to 1,3625 with LLC

[Lsdmeasap]

I can't set 0.871 and 0.863 is the closest and it works.

I just wanted to check that aiming for 67% is the right thing to do.

You can set .871 if you want, you will just have to raise/lower Vtt until you find that as a option, it will be there. I Will go right now into my BIOS and find the exact setting amount for you and post back

But ya if .863 works then it may be best for your board, that is about .664 (.8632), But you can set .67 if you want for sure, you just have to adjust until you find it.

I will go check just incase that turns out to be unstable for you

[fatguy1992]

Yeah, that would be good thanks.

[Lsdmeasap]

Here is your choices around that .67% area for MCH Ref, with of course exact .67% (.871) >>>

Set Vtt at 1.40 then choose .871 and then adjust Vtt back to where you want it and you will be using (.871/.67% of Vtt)

Variances around .67%

Or Set Vtt at 1.28 and choose .870 and then adjust Vtt back to where you want it and you will be using (.87009/.6693%)

Or Set Vtt at 1.26 and choose .873 and then adjust Vtt back to where you want it and you will be using (.87308/.6716%)

Or Set Vtt at 1.24 and choose .875 and then adjust Vtt back to where you want it and you will be using (.87503/.6731%)

[fatguy1992]

Thanks i'll give it a go when I have restart the computer .

[pangingIII]

Q9300 495x7 5:6 DDR2-1188...
tried setting CPU's core voltage upto the Intel spec vcore 1.36250,
also tried VTT 1.36 which's right below vcore value and NB/MCH core 1.40,
and memory timing was set loose to 5-5-5-18 / 5-5-12-80-5.

Prime95 blend 1hr test only.



i still couldn't lower the CPU GTL_ref down, but if i recall right it's about same value that i needed to use for this Q9300 and at this CPU FSB on my other P45 board, but never gotten a chance to test it like i'm doing on this board.

[mark0326]

there were some misunderstanding about voltage values in ET6...
it's about time someone take the time to write and explain about the BIOS vs. ET6 voltage values...
i can now use the post as a ref instead of keep repeating myself...

When this board came out there were a few posts claiming that this board was the best/easiest overclocker... ever - and for the most part that's true. Then there followed a volley of posts remarking on the boards wacky Auto voltages, then came posts of high voltages (possibly) killing 45nm cpu's, some people are very unclear of how to make BIOS settings and as for GTL Ref's that's the equivalent to rocker science for most.
As good as this board is, I think it still warrants a good overclocking guide, we all like to push our cpu's near their limit and the closer we get to that limit... well, it requires a lot of patience and 'know-how'.
There is very good information in these forums - but it's all so fragmented.
I for one have a bit (OK, a lot) of difficulty piecing together or even understanding some of this information - yet alone putting it into a practice that works!

Generic oc guides help but as we know the hardware we all use is different, BIOS's are different, terminology in BIOS's are different, one BIOS has a GTL % another has a voltage and so on, should vTT be higher than vCore, how much higher should PLL be above vCore, what are safe ranges, should I start with 0.635 or 0.667 references, what about the NB... and the list goes on.
People can very soon lose interest if reading an article if not specifically geared to their hardware and these days we have busy lives and 'just want a quick fix' however right or wrong that is.

This is just my little rant for this morning, I've always found guides for my previous motherboards but so far I've not seen one for this family of boards, challenge - prove me wrong.
There's always the argument that the information on these forums will always be fragmented, that's how a forum works but we used to have good overclocking guides... so why don't we now?
Also as technology improves there still seems to be such a void between those that design/make/know and us the consumers when it comes to understanding what we are playing with - though there may be good reasons for that.

* This post isn't directed at pangingIII or anyone else for that matter - just used the quote above as a starting point.

[ezaleina]

hi all.,off topic abit.,which 1 better.,oc with 4x1GB or 2x2GB..tq

[pangingIII]

hi all.,off topic abit.,which 1 better.,oc with 4x1GB or 2x2GB..tq

ezaleina,
i would say 4x1GB, in terms of ram overclocking headroom.
at 500fsb with 4x1GB (of a well-matching and good overclocking ram kits) you can still ran ram at DDR2-1200), or you could run them at 1:1 CAS4-4-4 DDR2-1000.
you may not able to do these same things by using a 2x2GB kit.

what is your goal in overclocking the CPU and ram anyways?

[ezaleina]

ezaleina,
i would say 4x1GB, in terms of ram overclocking headroom.
at 500fsb with 4x1GB (of a well-matching and good overclocking ram kits) you can still ran ram at DDR2-1200), or you could run them at 1:1 CAS4-4-4 DDR2-1000.
you may not able to do these same things by using a 2x2GB kit.

what is your goal in overclocking the CPU and ram anyways?

tq bro pangingIII.,i dunno what to say when u ask me what is my goal in OC.,as long as i know.,i just do it for my job.,i work in a computer shop in Malaysia.,my boss always say want to give customer satisfaction.,he wants we the technical dept demonstrate the performance system that they bought..before this i dunno how to Oc and not interested to OC.,after my boss said he wants he's staff increase their performance i try to learn it step by step in this forum..and when the customer ask how to OC.,or u know how to oc.,at least i knew how to do it..tq

[PolRoger]

Glad I could be of some help! I have been trying to post this around a few places to help others out!

I posted it here a time or two, but only a small part of it. I just made out the examples tonight as I seen what I had previously posted still left some users a bit confused.

I do think it should be handled a little better in the BIOS Vs. EasyTune but at least now I know for sure what is what and how to manipulate it

Hope this helps many users, as I know this can be a very tricky subject

Thanks for your post about the relationship of the BIOS settings to ET6 when adjusting cpu/mch refs for these boards. I've had success through just plain old trial and error but what your saying makes sense to me and should prove helpful.