128/144Mbit RDRAM 256K x 16/18 bit x 2*16 Dependent Banks Direct RDRAMTM 256K x 16 x 32s dependent banks direct RDRAM. Access time: 45 ns, speed: 711 mbps(356 MHz). 256K x 18 x 32s dependent banks direct RDRAM. Access time: 45 ns, speed: 711 mbps(356 MHz). 256K x 18 x 32s dependent banks direct RDRAM. Access time: 45 ns, speed: 800 mbps(400 MHz).