as far i recall from certain threads on a1k.org the adress space of a4k/a3k cpu slot is limited to 128mb. well. i have no technical understanding to fully comprehend what that means, but from what ive read there i assume one could put more ram on an accel but probably some workaround woud be needed. a1200s are another issue since the accel will be connected to another bus so paradoxically you can have 265mb on a blizzard. tough world.