for its worth ,ap133 /693a mobo did not accept any of the ecc256 mb ram
nor 3 x 128mb ecc ram (only posted once with 384) on default bus speeds
but runs fine @150 fsb with 128mb ea in slot 1 and 3 with (256)cas 2-2-2 timings on compaq pc100 ecc ram
i beleive the best via tech expert is george breeze,his software tools
are brilliant and i thouroughly reccomend his reads.