The RamFAST is the fastest SCSI card for the Apple II. The Transwarp GS could run up to 16Mhz, but that requires modification and a better power supply. The law of diminishing returns kicks in though, so any speed boost over 12Mhz would be negligible. Performance of the card likely won't improve much with a faster hard drive. The Apple II bus is the bottleneck. Speed of CF vs. USB doesn't make a difference, both are so much faster compared to the host system. The CFFA3000 has more processing power than the IIgs its in!