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Intel Core i7 975 Extreme

Nice - but the cheaper, updated i7 920 is nicer

The new 975 Extreme has moved to Stepping D0, and we're told that the new 950 also uses D0:

i7 975 Stepping D0

We had a word with Intel and were promised a 920 on Stepping D0 that would do wonderful things in the overclocking stakes. We duly received a new 920 and it had exactly the same performance as our existing 920. CPU-Z identifies it as a Stepping C0/C1:

i7 920 Stepping C0/C1

so we guess it's actually a C1. We then received another package and this time it was indeed a Core i7 920 D0:

i7 920 Stepping D0