Will PC133 or PC100 memory work on a motherboard that has a 66 Mhz Front Side Bus (FSB)?
February 19, 2008 6:52 pm Old GuidesYES. In general, SDRAM is backward compatible and can run at bus speeds slower than that for which it is rated. For example, the 128 Mbytes of PC133 memory I have in my computer with an EpoX MVP3G2 Super 7 motherboard, which supports PC100 memory, works with a 100 Mhz FSB.. There are a few older 66 Mhz motherboards that will not work PC100 or PC133 memory, but they are exceptions, not the rule.