Listing is for a Lot of (4) Micron MT18JSF1G72PZ-1G9E1HE 8GB 1Rx4 PC3-14900R Server Memory HP 731657-081  ECC REG Memory. NOT 4 PC!!  THIS MEMORY IS REGISTERED ECC and IS FOR SERVERS ONLY!  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