Since this topic is linked to from this post in a different thread and serves as the de facto motherboard compatibility guide for C3 CPUs, I am necro'ing this for my own report.
I am reporting that the Ezra-T (C5N) does not work on the P3B-F at all, even with this special BIOS meant to add support for it.
I tested with and without a lin-lin adapter on an Abit Slotket III. The symptom is just that there is no post whatsoever, with all dashes on the diagnostic card.
Either than or my CPU is defective, which I doubt.
EDIT:CPU tested and confirmed to be working on different motherboard.
EDIT 2:FYI, Ezra-T does not require the lin-lin adapter, however, it does require a slotket with an independent voltage regulator. Eventhough my motherboard's voltage regulator supports the lower end of the voltage spectrum for Coppermine CPUs (down to 1.30v), and Coppermine CPUs work fine on ordinary slotkets, the Ezra-T will only work on my Abit Slotket III. The MS-6905 Slotket that others report success with also has a regulator on it.