This particular quirk seems to be coming out of the woodwork on the main Epox newsgroup on the Epox news server, particularly with people who have Duron 800+ CPUs.
The quirk is being reported as this: When switching JP5, the jumper that controls the FSB from 100 MHz default to 133 MHz default, from 100 MHz to 133 MHz, the motherboard will at first try to post at the new FSB *with the default multiplier* before switching to the modified multiplier. This apparently is true regardless of how long you have modified the multiplier.
For example, using a Duron 800 someone might close the L1 bridges and change the multiplier to 6x, making it a 600 (6x100). Then you change JP5 from 100 MHz to 133 MHz, anticipating a post at 800 (6x133). But the experience I am hearing is that the system actually initially tries to use the default multiplier (8) after the JP5 switch before changing to the modified multiplier.
That might sound silly, because many 800 MHz Durons will not post at 8x133 and why would Epox do that anyway, but one particular user further modified his L3 and L6 connections to lower the default multiplier to 7 and he was then able to successfully make the JP5 switch and proceed to overclock from there, because the initial post at the default multiplier, 7x133, succeeded.
Then someone else said that was a general KT133a issue, but no Epox rep has posted to the thread so we are kind of left hanging. I am currently trying to get e-mail confirmation, but the first response I got back was the typical 'We don't condone ocerclocking' response so I am trying a second time.
So if anyone has any information regarding this rather odd issue we would be most appreciative. I will also post if I get anything informative from Epox or if they post an official response to their news server.
Thanks.