Overclocking A3640

[mechy]

I don't know if it matters or is the case here, but i have found 3.1 marked boards with early pals as a 3.0 board would have.

also would upgrading u209 help ?

Of the 8 of these i have overclocked in the years, i have found 1 that would not tolerate over 28mhz even with the delay line hacks. I never did figure out what was the cause.. i have to assume its a pal or timing problem.

mech

[mechy]

Well, I relplaced the 74F08 @ U103 with a 74HC08 and the machine managed to boot once @ 31mhz but the machine hanged and the graphics corrrupted.  Put back in the 25mhz Oscillator and everything works fine.....

I wish that I didn't have to give up here but I have no idea what else to try.

Grab a warpengine 040/40 or some 060 card, it will run rings around that 3640.
I know its not what you want to hear and it costs more,but its worth it,if not for only the 128MB ram you can install. The warp engine scsi also rocks.

Mech