4 Used x TMS4464-12 64Kx4 bit DRAM chip, ZX Spectrum +2A/2B, +3/3B.. TMS4464-12NL 64K (16Kx4) 120ns DRAM by Texas Instruments. Package: 18-pin DIP Four chips included. Chips will be fully tested before dispatch. Pictures are indicative of the item you will receive. Exact item may be slightly different.