By brand, we buy Samsung, SK hynix, Micron, Dell, Corsair, Kingston, G.Skill, and others not listed. We buy memory made for Cisco, Dell, Fujitsu, HPE, IBM, Lenovo, Supermicro, Quanta, and other systems. We buy All DIMM types: LRDIMM, RDIMM, SODIMM, and UDIMM. We buy DDR4-3200, DDR4-2933, DDR4-2666, DDR4-2400, DDR4-2133, DDR3-1866, DDR3-1600, DDR3-1333, and DDR3-1066. By Capacity, we buy 128GB, 64GB, 32GB, 16GB, 12GB, and 8GB DDR3 and DDR4, though only in bulk.