The Direct Rambus SO-RIMM module is a general-purpose high-performance memory module subsystem suitable for use in a broad range of applications including computer memory, mobile personal computers, networking systems, and other applications where high bandwidth and low latency are required. MC-4R256FKE8S modules consists of eight 288M Direct Rambus DRAM (Direct RDRAM) devices (PD488588). These are extremely high-speed CMOS DRAMs organized as 16M words by 18 bits. The use of Rambus Signaling Level (RSL) technology permits 800MHz transfer rates while using conventional system and board design technologies.