Possible values of an option:
Depend on memory type, there can be a variant [Auto]
The option description:
Sets quantity of steps between the reference to memory and the regeneration beginning (parametre tRAS in the access diagramme). For SDRAM values from  to  steps are typical. DDR SDRAM it is characterised by values from  to  steps, DDR2 SDRAM — from  to  steps, DDR3 SDRAM — from  to  steps. In case of qualitative memory it is possible to try to establish the underestimated value. Among possible values can be present and a variant [Auto] (the information undertakes from microcircuit SPD).
Other options identical to destination: