There will be two kinds of socket 939s. There will be the "big" FX type model, and there will be Newcastles for the rest of us, a split similiar to Intel's Extreme Edition versus regular PIVs.
AMD ought to have an easier time making a lot of chips with 512K cache than 1Mb cache and/or sell "big" FXs where only half the cache works right, so prices shouldn't be too bad for those.
The same split will occur through the transition to 90nm. You'll have a "big" and a "little" socket 939 chip.
Some seem to think this quite confusing, but it really ought not to be. The expensive chips with 1Mb cache will remain FXs, and the Newcastles will 512K will be the mainstream chip at more reasonable prices.
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