Originally Posted by zodac
CPU: 3.9Ghz (19.5*200) - 1.4875v in BIOS, CPU-Z jumps between 1.524-1.536v though.
NB: 2600Mhz - 1.3v
RAM: Stock (1333Mhz), 1.485v
HT:2000Mhz - Not sure on voltage; haven't touched it.
I know every chip is different and there are other factors to consider here, but did you try starting with 1.4v in BIOS and up it step by step to reach stability? 1.4875 just seems way high in BIOS, because your LLC profile is pushing that to 1.5+ which isn't good for temps or your CPU. Or you could try just lowering your LLC profile. Also mine was waaay more stable using higher FSB and a lower multiplier (250x16 rather than 200x20).
Same goes for your CPU-NB, 1.3v should be good for 3000Mhz, so you could try lowering that to 1.2ish if you want to stay with 2600Mhz which will also lower your temps. I did see a big performance
gain when I went from 2600Mhz to 3000Mhz @ 4GHZ, however for stability
you are right on point as Northbridge Frequency (+/-200) = (CPU-Frequency * 2 ) / 3.15 which puts 4GHZ @ 2539.683Mhz sweet spot.
RAM voltage should be whatever it's rated for give or take a point.
HT Link should stay at 2000Mhz, however shouldn't see a performance decrease up to 2350MHz on the HT Link if you have to choose it, but anything higher than 2000MHz is recommend you increase the HT Link Voltage. And keep in mind that there is nothing actually gained by overclocking the HT Link - it's merely a pipeline (albeit a pipeline used to carry data for just about everything on the board). Also make sure "HT link is equal to or greater than the speed of the memory".Edited by ALUCARDVPR - 7/14/11 at 2:38am