 The 16 RAM slots on the motherboard can be populated with either 1 MB SIMMs for a total of 16 MB, or with 4 MB SIMMs for a total of 64 MB.Standard 30 pin SIMMs can be used as long as they use parity error detection and are rated 80 ns or faster.The SPARCstation 2 uses a standard 50-pin SCSI interface and can house two 3 1/2" full-height disk drives.