Possible values of an option:
[1X], [2X], [4X]
[2X], [4X], [8X]
The option description:
Allows to specify a mode in which bus AGP should function. For rather new videocards for this bus mode support [8X] should be included. Older products can demand value setting [4X], absolutely become outdated — [2X], the mode [1X] (the very first videocards for this bus) is minimum possible.
Other options identical to destination: