has (427) sticks of PC4 ECC server RAM available. Speeds include 2133MHz, 2400MHz 2666MHz and 2933MHz. MFG’s include Samsung, SK Hynix, and Micron. All our RAM includes a 60-day rranty, has been tested to the R2v3 standard and is considered key functions working. A spreadsheet is available upon request which supplies the MFG, models, QTY’s, speeds, and capacities. Send me your questions or requests and thanks for looking.