KM418RD8AD-RG60 256K x 18 x 32s dependent banks direct RDRAM. Access time 53.3 ns, speed 600 Mbps(300 MHz).
KM418RD8AD-RK70 256K x 18 x 32s dependent banks direct RDRAM. Access time 45 ns, speed 711 Mbps(356 MHz).
KM418RD8AD-RK80 256K x 18 x 32s dependent banks direct RDRAM. Access time 45 ns, speed 800 Mbps(400 MHz).