Quote Originally Posted by abeeftec View Post
Its definately related to BCLK and or liquid and air cooling. If you had Phase it would go over with no problem without finding the BCLK sweet spot at an even lower voltage then you 5.1ghz takes. But without Phase if you can hit 5.0 or 5.1ghz on at a certain voltage but cant get any higher, Finding the BCLK sweet spot will get you over. But only for another 2 or 300mhz.

Just to be sure, I had my UD7 board and the CPU would not go over 5.1ghz. It would get to starting windows but no logo spin. It would do 5.1 at 1.48v but anything over 5.1 even up to 1.66v would stick at the exact same point the where it would show starting windows but no logo spin at all. Then I put that board on phase and reached 5.6ghz at 1.62v.

I dont know if its heat related but it may be surging so fast it locks before you see it.
Quote Originally Posted by OC Nub View Post
My first chip clocks great with low voltage, but it wont boot at 5200mhz no matter what. I think it was raja@asus that posted about the chips that do 2600+ mem are also the highest clocking chips.

The chip im using now needs higher voltage clock for clock than the first chip, but it will boot at 5400mhz (not benchable on water) and is benchable up to 5250-5300mhz. It is also much better for higher memory frequency.
Quote Originally Posted by mdzcpa View Post
My findings are similar. My more voltage hungry 3960x actually clocked higher than my lower voltage chips. In any event, it does seem that the limits on these chips are firm unless your go sub ambient. I've had 4 chips so far and only one does 24/7 reliably at 5.1ghz. All of them are benchable at between 4.9 and 5.2, but 3 of them hit the wall firmly at 4.9 to 5ghz with water cooling for daily use. Base clock, strap, and multiplier combos didn't matter much.
Thank you for the reply!!!