First post, by feipoa
I recently ordered some 128 MB EDO DIMM modules from eBay in hope of maxing out an Intel PR440FX dual Pentium Pro motherboard. The modules are buffered with parity and have 50 ns ICs. The sticker on the modules reads Smart SM572164098E6G5OE0, while the RAM IC's are OKI D51V64405E-50. I was unable to locate a datasheet for either the modules or the IC's.
On the eBay listing, they were noted to be 128 MB modules, but the motherboard reads them as 64 MB. Thus I am trying to determine if the modules are really 64 MB, or if the motherboard has some incompatibility with these modules, e.g. due to memory configuration, refresh, or whatever. Attached below is a photo of one of the modules, front and back. I did notice that the IC's on the back are flipped around, though it seems unlikely that they would be wired incorrectly.
Not sure of it matters for memory compatibility, but I am running two Pentium II Overdrive units at 333 MHz.