SDRAM load capacitance calculator

I am interfacing SDRAM IS45S32160F-7BLA2 with MPC8270 PowerPC Processor.

Input capacitance of SDRAM is 6pF per data line and i am using 4 SDRAM's which add upto 24pF of capacitance load.

Processor suggest to have a minimum loading of 20pF. 

Now the problem is current . Processor datasheet says Ioh = -2mA and Iol = 6mA. at Voh = 2.4 and Vol = 0.4

Keeping this current in mind, i=C dV/dT fails, as 20pF of load capacitance needs around 60mA and Iol and Ioh is 2 to 6mA , which i cannot understand?