For DDR related models: Model name shows DDR type and driver impedance. For example, ddr2_drvr_18 should be used for DDR2 and 18 ohm drive strength.
For opdalg_out, pouv_out, ptrmr100_cm, rx_pzctl, tx_pzctl - The pins using these models don't have any other choice of model.
For v180_in_wb, v330_in_wb, v250_wb, v250_in_wb, v180_wb, v330_wb - These should be chosen for the interfaces with LVCMOS I/Os like eLBC. The numbers in the name depict the voltage level, e.g. v180_in_wb is applicable for 1.8V receiver.
For other models - Those are not utilized directly for any pin so user can ignore them.
Hi I was looking for the P1011 IBIS model and came across this thread. Where can I download the IBIS model for the P1011?