DRAM Timing tRAS
Possible values of an option:
Depend on storage type, there can be a variant [Auto]
The option description:
Sets an amount of clock periods between reversal to storage and the regeneration beginning (parameter tRAS in the access chart). For SDRAM values from  to  clock periods are typical. DDR SDRAM it is characterized by values from  to  clock periods, DDR2 SDRAM — from  to  clock periods, DDR3 SDRAM — from  to  clock periods. In case of qualitative storage it is possible to try to install the underestimated value. Among possible values can be present and a variant [Auto] (the information undertakes from chip SPD).
Other options identical to destination: