Possible values of an option:
[3.9 µs], [7.8 µs], [15.6 µs], [31.2 µs], [64 µs] and, probably, [Auto]
The option description:
Sets the period between regeneration of the next lines of the module of memory. Standard value [15.6 µs] (15.6 micro seconds), whenever possible is recommended to establish a variant [Auto]. If qualitative modules of memory are applied, it is possible to try to increase value of an option to [31.2 µs] or even to [64 µs] that will positively affect speed of the computer. In case of problem modules, on the contrary, it can be demanded to reduce the period to [7.8 µs] or to [3.9 µs].
Sometimes instead of micro seconds (or on a level with them) values can be presented in steps.
Other options identical to destination: