Well first off, don't assume a current 775 board is going to work with Conroe. Some 975 boards might, but only new ones. Check for Rev C boards with the new VRM to support Conroe and it may work.
Sorry, no Cedar Mill or Presler here, so can't help you. But as I am sure you saw at XS they are clocking very well.
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DS3 | E6400 - 3.2GHz 24/7 | 2GB OCZ PLat. PC6400 | 6800GT | Zippy 460W
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