Adding RAM to A3000D

[Tenacious]

There's also the DKB 3128 and ZorRAM which is currently for sale:

http://amigakit.leamancomputing.com/catalog/product_info.php?cPath=51&products_id=958

...costly, but both of these solutions are Amiga 3000 Zorro III 32-bit FastRAM done right.

I have the 128 Meg version of ZorRAM in my other A3000.  It's excellent, plug and play!

Before the ZorRAM was recently released, a used DKB 3128 was very rare and rediculously overpriced.  I don't know which is the better performer speed-wise, but, I imagine the ZorRAM will draw far less current (It won't tax your PS).

It's the the 16-bit bus Amigas (A2000s, 1000s, 600s and 500s) that have the 8 Meg address limit when used without a 32-bit accelerator.

Also, a 16-bit memory board designed for the A2000 will slow a 32-bit bus Amiga like the 3000.  They're a bad choice.

[Tenacious]

Z2 RAM is bound to slow down the machine, so probably the smartest choice is a SIMM adapter and no-cost (or close to) SIMMs for it. If you're not planning to get an accelerator that is.

I am probably not understanding your advice, or, maybe I don't know what a SIMM adapter is.  Doesn't the SIMM adapter go onto the motherboard where the Zip ram chips normally go?  Isn't this location on the motherboard limited to 16 Megs?  Aren't SIMM adapters themselves rare and still expensive?

ZorRAM goes for about $137.  That's a little over a dollar per meg, not bad for a 20 year old machine.

EDIT: I think ZorRAM will perform best if there is some Fast Ram on the motherboard.  It seems I read that somewhere.