I'm sorta in the same boat, I have a giga ud5 and my first task is to get the DFI dialed in so I can do a true "apples to apples " head to head comparison between the DFI and the giga with same components. I'll use a voltmeter to insure same Vcore and do two prime runs, 1.34v and 1.45v Vcore. I'm using a Tuniq Tower 120mm w/120mm fan at 2100 RPM
for benching (900 RPM for 24/7). I have to turn off HT for benching cause heat overwhelms with HT enabled.
BTW, for what it's worth...I have tested 4 i7 920's to date. Two were from Amazon.com LLC (sold and shipped by Amazon.com as opposed to one of their 3rd party vendors).
The first of these two was very weak, could do only 3.7 Ghz or so. The second was defective in that no matter what I did, it would max out temps on all cores at 100C within a couple minutes. I sent both of them back, the point being that they both were very similar in their batch numbers and version nums (#....-002) and pack dates. I ordered a third chip and when I got it, I saw the same info as the other two bad chips and decided to send it back without opening it. Now maybe there's nothing to it, just bad luck, but I would stay away from Amazon.com LLC as a source. the two 'good' chips were version num #....-001 and were right in the ball park of expected performance. Not great like eva2000, but at least average from what I've seen on this forum. To be clear, I'm only complaining about Amazon.com LLC, not BuyNow.com, which is also a vendor on the Amazon site. One of the two 'good' chips was in fact from BuyNow.