has (400) sticks of PC4 laptop RAM available. Speeds range from 2133MHz -3200MHz and they’re available in 4GB, 8GB and 16GB capacities. All our RAM includes a 90-day rranty, has been tested to the R2v3 standard and is considered key functions working. A spreadsheet is available upon request which supplies the pertinent information. Send me your questions and requests. Thank you!