Quote Originally Posted by unclewebb View Post
I'm trying to learn more about what is hurting these new E8x00 processors. Can you still run Prime at 4050 MHz and how much voltage do you need now?

What was the highest voltage you ever saw in CPU-Z when testing? Did you ever go over 1.45 volts even briefly?

Part of the problem might be the FSB Termination voltage. The Intel spec for these new CPUs is only 1.1 volts +/- 5% so the max is 1.155v. Some of the older boards can't get down this low even at the lowest bios setting. What is your setting for this?

I mentioned this in another thread but it needs to be said again. Here's what the Intel datasheet says about core voltage:

2.6.1 Absolute Maximum and Minimum Ratings

Table 3 specifies absolute maximum and minimum ratings only and lie outside the functional limits of the processor. Within functional operation limits, functionality and long-term reliability can be expected. At conditions outside functional operation condition limits, but within absolute maximum and minimum ratings,

Intel defines Absolute Maximum core voltage for these new 45nm chips as 1.45 volts. That number is not necessarily a safe 24/7 voltage. At 1.45 volts you are "outside the functional limits of the processor" and "neither functionality nor long-term reliability can be expected."
1)I tried 1.33V for 4050 but it was no go
2)So i kept my 1.3V and lower to 3950. Prime still no go.
3)I did not went over 1.45V. And this voltage for 4.5GHz was only for one hour benching session.
4) I have the Maximus formula. I kept these settings in 24/7 and in benching
PLL was minimum to 1.5 but mobo overvolts to 1.6
FSB Termination to 1.2 but mobo undervolts to 1.1 because of Wolfdale. With
my E6750 previously 1.2 was 1.2 no undervolting. That means that Formula
has considered the right FSBTermination for Wofdales.
5)Since first day i was running at 1.3@4050 and after the benching session i had
the degrade.

Conclusion for me:all wolfdales that needs low voltage at start will degrade and reach those that are not good overclockers (e.g. 1.45V@4GHz) even at low voltages.Even if i have not raised the vcore to 1.45 i would still have the degrade in my opinion.

To sum up in order to bench at 4500@1.45V
CPU PLL: 1.50 ~ 1.6 monitor
FSBv/ VTT: 1.20 ~ 1.12 monitor
CPU GTL: 0.63x
NB GTL: 0.67x