HP Designjet 500 Plus

Memory
The D/A1 size and A0+/E+ size HP Designjet 500 Plus printers come with 32 MB of internal Random Access
Memory (RAM). Additional memory can be added to the HP-GL/2
Accessory card that came with your printer. You
can add 64 MB (part number C2387A) or 128 MB (part number C2388A) of memory for large file processing and
improved printing.