I have an Asus P4S533 motherboard with a 533mhz Front Side Bus. I use 1 GB of 333mhz Ram. I installed this program by Asus. This program tells info about your computer, like Processor Speed, Amount of memory, BIOS info, etc. etc. etc. Theirs this one section and all it says is "Bus Speed 133mhz" Anyone know what this means. Cuz if my memory is only clocking at 133mhz or my FSB is not configured right I need to fix it. I think this might be the speed of the IDE cables, for data to and from my HardDrives. But I don't know for sure. Any info would help.