Further, from Buhammot's result
HTT = 280.8 MHz
CPU = 2527 MHz
memory = 187 MHz
memory_HTT_ratio = 187 / 280.8 = 0.666
memory_divider = 2527 / 187 = 13.51
So 1/2 multiplier for memory_divider is working.
I have also seen 1/2 multiplier is working for CPU_multiplier.
HTT = 280.8 MHz
CPU = 2527 MHz
memory = 187 MHz
memory_HTT_ratio = 187 / 280.8 = 0.666
memory_divider = 2527 / 187 = 13.51
So 1/2 multiplier for memory_divider is working.
I have also seen 1/2 multiplier is working for CPU_multiplier.