Hi guys. New member here, been on OCN for a little while but just recently discovered this forum. Have somewhat of a build thread running over there, but really been following the i7 920 OC discussion there, and spent the past few days going through this thread.

With the 965 and P6T, 4.0 was so easy that I didn't feel it was worth shouting about. Understanding the impact of voltages, ratios and such to get >1GHz OC has been a bit frustrating. It also doesn't help that there is nothing definitive when it comes to voltages - I guess that's just how it goes with a new chip.

I actually have what appears to be a pretty stable 4.2 combination. Numbers are 27x157, 785 on the RAM, QPI @ 5666.

Where I'm stuck is with the Uncore speed, I am having to drop it to 3147 to get the system stable. I can up the voltage (labelled QPI/DRAM core in the P6T bios) but due to the cost of this CPU I am trying to keep my voltages pretty close to specs - VCore is 1.37V (with LLC enabled, it only varies by +/- .05V), and Uncore voltage up now to 1.325V. I'm sure more voltage would help, but - I'm afraid!

I am trying to find optimal performance for the system overall, not just a trophy-winning CPU clock. I'll try some Sandra tests to see if I can find a relationship between overall performance and Uncore speed, at least, the point at which a low speed Uncore impacts overall performance. Problem is, what is "overall performance"?

Just wanted to say Hi and thanks for all the good info here. Got some pics of my rig in my profile album.
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