There are no 256 meg 72 pin SIMMs. The page linked to from this site says that the author was mistaken, and they were 168 pin SIMMs. While 512 meg SIMMs are po

There are no 256 meg 72 pin SIMMs. The page linked to from this site says that the author was mistaken, and they were 168 pin SIMMs. While 512 meg SIMMs are possible, they'd be custom. Otherwise, a 256 meg SIMM would be a single bank, which wouldn't make much sense.