This lot of 6 x 4GB server RAM modules is a great addition to any server or workstation setup. With a total of six modules, you'll have plenty of memory to support your server components and keep things running smoothly. The brand of these modules is SK Hynix, Samsung and Axiom so you can trust that they are high quality and reliable. Included are the following: 3 x SK Hynix 4GB 1Rx8 PC3-14900R HMT451R7AFR8C-RD DDR3-1866 REG. ECC Server Memory 1 x AXIOM 2x4GB (8gb) DDR3-1600 PC3-12800 Reg Desktop Memory Modules 51264Y8D3N16813 1 x Hynix 4GB PC3-12800 DDR3- 1600MHz non-ECC Unbuffered CL11 240-Pin DIMM HMT351U6CFR8C 1 x Samsung 4GB PC3-10600U DDR3 1333MHz DIMM 240 Pin Memory M378B5273DH0-CH9 These modules are used, but have been well taken care of and are in excellent working condition. They are compatible with a variety of server models, making them a versatile choice for your networking needs. Don't miss out on this opportunity to upgrade your server's memory with these top-notch RAM modules.