Q6600+750i FTW GTL settings. - Page 2 - Overclock.net

10acjed · 01-19-09

GTL REF voltage changing has helped some in getting their cpu stable...

It will take alot of time tho... My suggestion is to try going to the desired vcore and clock speed and set all GTL REF to auto. try to boot up, if it just freezes then check the GTL voltages again, you should see one increased itself, I use +10 above that on all 4 and try again and continue adding +10 and see if it helps...

For me I was able to boot into windows and run Prime95 for 2hrs before it failed....

So it did help, just not enough to get me stable...

Good luck

Slightly skewed · 01-20-09

Quote:

Originally Posted by 10acjed

GTL REF voltage changing has helped some in getting their cpu stable...

It will take alot of time tho... My suggestion is to try going to the desired vcore and clock speed and set all GTL REF to auto. try to boot up, if it just freezes then check the GTL voltages again, you should see one increased itself, I use +10 above that on all 4 and try again and continue adding +10 and see if it helps...

For me I was able to boot into windows and run Prime95 for 2hrs before it failed....

So it did help, just not enough to get me stable...

Good luck

Thanks, I'll give that a shot.

mnishimura00 · 01-20-09

I had 3 cores fail at 3 hours in OCCT... I bumped it up to +120 on all lanes and the problem went away.

GeforceGTS · 01-20-09

Quote:

Originally Posted by 10acjed

My suggestion is to try going to the desired vcore and clock speed and set all GTL REF to auto. try to boot up, if it just freezes then check the GTL voltages again, you should see one increased itself, I use +10 above that on all 4 and try again and continue adding +10 and see if it helps...

I thought the auto was fudged?

Quote:

But what about the (auto) setting in the bios?

Frankly, it is more or less useless. The auto setting code is broken, as it only sets one lane (lane 1) to an arbitrary amount taken from a chart. It seems to be a vestige from when nForce boards only allowed you a global GTLREF adjustment to all four lanes.

The chart is as follows:
For a given Front Side Bus QDR (Quad Data Rate, fsbx4) speed, GTLREF Lane 1 =

0- ~1149 MHZ = 0mV
1150 - 1199 MHZ = 70mV The motherboard adds 50mV to compensate for increased impedance due to over volting and 20mV to compensate for increased freq
1200 - ~1499 mhz = 90 mV, an incremental increase of 20mV
~1500 - ~1899 = 110 mV - note that @ 1700 and up ~100mV over NOMINAL would be unstable. If VTT*.67+110mv is nominal then you'd be fine.
1900+ = 130mV

This chart is approximate because exact values of FSB speed could not be obtained due to FSB holes. I'm sure some engineer somewhere had a reason why they created this chart like this, but it's not based on anything concrete and was not implemented properly (it should set all four lanes to SOMETHING). Perhaps this will be fixed in a later BIOS release. Right now, these values are useless. It may or may not be a stable value for you (even if you set all lanes to it), this would purely be by chance if it is.

The 7 Series motherboard has NO WAY to monitor ACTUAL VTT voltage or ACTUAL GTLREF lane voltage.

The ONLY factor that makes the motherboard refer to the chart is the FSB QDR frequency. It does not make any adjustments when you change VTT, Vcore, or CPU multiplier, or any other setting for that matter. I have tested all of these variables and only a change in FSB frequency will cause the motherboard to refer to the chart. Changes in all the other variables will require an adjustment in GTLREF voltage, and since no automatic adjustment is made, we can conclude that setting can be disregarded. With out having the ability to monitor actual voltages of VTT and GTLREF the (auto) setting adjustment the motherboard makes to lane 1 are seemingly pulled out of thin air. GTLREF Nominal ratio does not scale this way (IE in steps).

Although bumping them +10 booting and testing then if it fails rinse and repeat is the best way to go about it really.

Slightly skewed · 01-20-09

Working on it now.....

SlicketyRickety · 01-20-09

Funny thing is mine are at -25,-15, +00 +00.

1 way to start is set the MV on auto, then get it to the max where it will kind off boot but freeze on 4E or 64 then hit reset like 10 times or untill it starts in safe mode go in and look at the ref's now and you should have a base starting point now increase it by 5 untill it just gives a 11 code freeze then reset button 10 times or until it starts in safe mode check the refs and see if there going up or down. Now you know what way to go up or down, then just increase or decrease in increments of 5. Goodluck

Slightly skewed · 01-20-09

No luck so far.

Slightly skewed · 01-20-09

Quote:

Originally Posted by SlicketyRickety

Funny thing is mine are at -25,-15, +00 +00.

1 way to start is set the MV on auto, then get it to the max where it will kind off boot but freeze on 4E or 64 then hit reset like 10 times or untill it starts in safe mode go in and look at the ref's now and you should have a base starting point now increase it by 5 untill it just gives a 11 code freeze then reset button 10 times or until it starts in safe mode check the refs and see if there going up or down. Now you know what way to go up or down, then just increase or decrease in increments of 5. Goodluck

Thanks for the suggestion. I may try this. I'm not sure what the bolded parts mean. How to do I determine what they are? Will they show up in the BSOD screen?

SlicketyRickety · 01-21-09

Quote:

Originally Posted by Slightly skewed

Thanks for the suggestion. I may try this. I'm not sure what the bolded parts mean. How to do I determine what they are? Will they show up in the BSOD screen?

If you mobo came with a manual the codes it shows on the mobo are in the back of the book

Goodluckman

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Q6600+750i FTW GTL settings.

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