You should be able to make use of it in 128MB RAM, and seeing as the memory is faster on the A4000 card, as well as the faster CPU, it would be the more desirable card to use.
Not understand you very well, but 128 mb on my csppc it is not enough! After OS4 boot i have about 60-70 mb free, and after load Origin web browser - about 15-20mb. I realy need more, then 128Mb! but looks like OS4 not supported zorro memory. Or does?
However, I'm not fully sure if OS4.0 supports the SCSI on the Cyberstorm or Blizzard for that matter, so you may be restricted to slow IDE in either case...
CSPPC scsi work good, about 20-25 mb/s, so its ok for me, but seems no support for BlizzardPPC scsi.
So i still don't know what is the fastest way to connect hdd to 1200.