Have an old 486DX box with 8 sticks of this stuff, and I have no idea what it is.30 pins3 chips on each stick, 1 Siemans, and 2 Toshiba all on the same side of the PCBSiemens chip markings are HYB511000BJ-70 Toshiba chips are marked TC514400ASJL-70any insight you can offer would be a help. thanks