These two cards are based on the article BigRAM Z3 which was originally for an early Amiga developer conference

These two are the original Zorro III test boards containing Static RAM. The first board is unpopulated and the second is fully populated.

Max Ram: 32MB
Ram Type: ZIP Chips or SRAM Chips
Connection: Zorro III

Unfortunately the BigRAM was never actually released to the public and was only built as a prototype and "reference" card.

Thanks to Dave Haynie