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

[mskvorc1]

I'm running my EVGA 750i FTW with pencil mod. I have 1.31825V in BIOS & 1.304V under load and idle in Windows. This voltage is enough for 3,825 GHz (8,5x450). So with adjusting GTL Ref values I should be able to hit higher clocks at lower voltage, right? Mine FSB VTT is 1.20V in BIOS and 1.18V in Windows (at least Everest say's so...).

[mikeyakame]

I'm running my EVGA 750i FTW with pencil mod. I have 1.31825V in BIOS & 1.304V under load and idle in Windows. This voltage is enough for 3,825 GHz (8,5x450). So with adjusting GTL Ref values I should be able to hit higher clocks at lower voltage, right? Mine FSB VTT is 1.20V in BIOS and 1.18V in Windows (at least Everest say's so...).

Yes provided you raise VTT you should be able to. it's dependant on the VCore voltage, FSB frequency and VTT voltage. GTL reference voltages vary for different input and output voltages. The curve is not linear by far. What ratio or extra millivolts might work great for one vCore and one VTT might be out of range for another. It's alot of trial and error mostly. Look at that graph on the Techrepository article for FSB frequency vs GTL reference voltage and make sure you understand clearly what is happening. It will save you many hassles believe me. GTL reference voltage adjustment has the capacity to fine tune vCore and FSB frequency, along with NB voltage, but also has the same capacity to send your system haywire from bounce or jitter.