The RX660 has an RXv3 core and the frequency is 120MHz. Here is the core mark for CPU performance. As can be seen, competing MCU’s need 200MHz or higher to achieve the same performance with the RX660. Also, since there is no access wait time to ROM, stable and high-speed operations can be performed. The competitor's products need wait time for accessing ROM, so program computation is not stable. In addition, the waiting time is lower CPU performance. Customers can use RX to develop programs stably in the future.