DDR4 SODIMM Socket,Vertical Standard Type

The ZCU104 was qualified using a MTA8ATF51264HZ-2G6B1 in the SODIMM slot SODIMM native in the DDR4 PL Controller If you wish to use a custom part

They feature 288 pins for desktop modules and 260 pins for SO-DIMM slots, with reduced voltage requirements around DDR4 also supports

ddr4 slot vs ddr5 124A-52A02 DDR4 SODIMM Socket, Horizontal , STD, GF, Black, Reel, Short Latch, Brass ELECTRICAL Current Rating: per pin Voltage Rating: 25

ddr4 sodimm slot slot is working then my first suspect would be bent Pins in the LGA Socket as they are very easily bent as there tiny Soft gold pins so