Listing is for a QTY of (4) Kingston 8GB 1Rx8 PC4-2666V-RD1-12 ECC Server Memory KSM26RS8/8MEI. This is ECC Registered memory and is for servers only.  Will not work with personal computers (PC's) or laptops!  Please check compatibility with your application prior to bidding.  Immediate payment is appreciated.  Item(s) will be re-listed after 2 days if payment has not been received.  Free shipping to the US!  Thank You