Actually that information is false.
Prescott is indeed compatible with the i865/i875 chipsets, however
some motherboard makers may not have designed their boards to the strict Prescott specifications in terms of power regulation and other aspects.
i.e. the issue is not with the chipsets, the issue is on a per-motherboard basis. Prescott design conformance is optional. Some mobo makers may have taken the cheap way out and dropped Prescott compatibility, while others may have kept future upgradability in mind.
If in doubt, check with your mobo maker, rather than randomly issued statements by various people.
Intel themselves say that i865 and i875 is compatible with Prescott in their tech documents.
Then again, what would Intel know?
