1 x NEC 256KB3J 256 KB 80 ns 30-pin SIMM parity RAM module | eBay
67.6mm*30 Wide Temperature -40~80 DDR4 RAM 2r*8 8GB 16GB 1.35V Memory RAM DDR RAM for Ruggedized Laptop Computers with Power-off Protection Function - China Memory and DDR price
4GB Memory for Lenovo B Series B51-30, B51-80 DDR3 PC3L-12800 SODIMM RAM | eBay