The S3200XL uses standard 72 pin SIMM chips (our Q type SIMMs in inventory). 16Mb stock soldered on mother board. Has two SIMMs slots that can hold 4 or 16Mb SIMMs. Simms can be installed in singles. Possible memory configurations are 16Mb, 20Mb, 24Mb, and 32Mb. This machine cannot access anything over 32Mb, and will ignore any memory beyond 32Mb. Also you have 2 card slots in the back of the machine that take 8Mb flash ram cards (FMX008) - 2 cards can be installed at the same time for 16Mb of flash ram (basically ROM) samples. Fully blown machine would have 16Mb ROM samples and 32Mb sample RAM.