This product is either discontinued or we cannot get that from suppliers.
Kingston KTH-PL429/64G DIMM Memory Lenovo, Capacity 64GB, 1 Module, Speed 2933MHz (PC4-23400), ECC Registered, CAS Latency 21, 2R (Dual Rank), FF DDR4, 288 Pin, Memory Voltage 1.2v.
Kingston memory is designed, manufactured and rigorously tested to meet the exact specifications of each brand name system. It's guaranteed to be compatible and backed by a lifetime warranty and legendary Kingston reliability.