I was actually quite surprised at the overclock I was able to get stable on the i7 975. I was expecting more with all of the buzz on the internet about 5GHz overclocks on air. But in the end I was only able to get 4.183GHz stable.
I had to change the RAM I was using from the Qimonda to Kingston just to get this OC.
We will be tinkering around with the i7 975 some more and hope to get a better overclock out of it soon.