How to set up GTL Ref Values for 45nm & 65nm

[mikeyakame]

You too mate! Kickin back at home isn't all that bad, it's something different than the usual!

[seban]

Hey !

Yup happy new year to all of ya ppl

I got little present for every one for new year .

It is simple Excel file which is counting GTLs and NB GTL as well as new Multiplier for you and few other minor values for given Vtt. It is nothing special but saves time and allows to tweak GTLs without asking for help and getting too much into it.

How to use it:

First type in desired / currently used vtt voltage as in your bios (or rather the way it looks loaded in Everest for example - but bios one is also working fine)

Secondly put some correction numbers and watch how GTL values are changing (Max and Min values of GTL for given VTT are also shown there).

The goal is to figure out which GTL works best for you for one VTT - in most cases the same GTLs voltages will work for different VTTs or very similar ones (or sometimes not ). So when we switch Vtt we would need to adjust GTLrefs to values which will give same or close to same GTLs as working previous ones for different vtt.

Anyway have fun using it, I created it to make my life easier and it does the job.

PS. There are 2 sets of values to compare between different VTT.
PS2. This calculator is made for MF2 board but will work with all boards that got correction number in equation (like +40 or - 20 and so on).

[CryptiK]

You too mate! Kickin back at home isn't all that bad, it's something different than the usual!

Ahh nice mate, same here, just having a quiet one in for once too Thanks too for the descriptions of the GTL's you provided, I couldn't have said it any better myself.

Hey !

Yup happy new year to all of ya ppl

***snip***

You too mate, hope you're having a good one.

Also thanks for taking the time to make up that spreadsheet, I have added it and your description to the first post.

[Ghostleader]

Do different chipset have different CPU, NB GTL as default.

Do P45 and X48 have the same

Example:

GTL Ref 0 = ,635
GTL Ref 1 = ,667
GTL Ref 2 = ,635
GTL Ref 3 = ,667

Is´t the CPU who determent what CPU GTL ref there´s, 45nm, 65nm or is´t the chipset.

What determent the NB GTL ref, does X48 and P45 chipset have the same GTL ref and does´t change if I run 45nm or 65nm CPU.



I run a EP45-UD3P board with a E8400@FSB 500 and I found that the most stable CPU ref are ~,635 and NB ref ~,600, the higher FSB the lower NB ref.

With my Q6600@FSB 475 I found that the most stable CPU ref are ~,667 and NB ref ~,700 the higher FSB the higher NB ref.


I have read the whole thread but I still think all this is quite confusing.

I understand that there´s a lot of trail and error also involved in this, I try different settings and I´m learn new this all the time.

Is there anyone how can answer me questions it will be much apprecieted.

[CryptiK]

Do different chipset have different CPU, NB GTL as default.

Do P45 and X48 have the same

Example:

GTL Ref 0 = ,635
GTL Ref 1 = ,667
GTL Ref 2 = ,635
GTL Ref 3 = ,667

**No not every board either X48 or P45 has the same setup, it depends on how the company wants to configure the BIOS options.

Is´t the CPU who determent what CPU GTL ref there´s, 45nm, 65nm or is´t the chipset.

**It's a combination of both the CPU and the individual board, for example if you keep the same CPU and replace the board with the exact same board again, you may need to re-adjust the GTL Refs as each set of board components/circuits behave slightly differently and give different resultant voltages even though you have set the BIOS options the same.

What determent the NB GTL ref, does X48 and P45 chipset have the same GTL ref and does´t change if I run 45nm or 65nm CPU.

**No the default GTL Ref multi of the X48 is different to the P45. What you set it to changes depending on the individual board (what is good for one board may nt be good for another board of the same type) and also if you run a 45nm or 65nm CPU, if you run a quad or a dual core, if you run 2GB or 4GB of ram, and if you run Crossfire or just a single card. It must be tuned for your individual components.


I run a EP45-UD3P board with a E8400@FSB 500 and I found that the most stable CPU ref are ~,635 and NB ref ~,600, the higher FSB the lower NB ref.

With my Q6600@FSB 475 I found that the most stable CPU ref are ~,667 and NB ref ~,700 the higher FSB the higher NB ref.


I have read the whole thread but I still think all this is quite confusing.

I understand that there´s a lot of trail and error also involved in this, I try different settings and I´m learn new this all the time.

Is there anyone how can answer me questions it will be much apprecieted.

I have answered in your quote as best I can. HTH.