There is no way to make that RAM work in your system -- the timing (cache latency) is too aggressive. You need CL-22 RAM -- if you are buying Kingston, here's what you need: [URL] Return the incompatible RAM and order that memory, which will work.  
Hi everyone! Today I've bought and tried to install a pair of Kingston KF432S20IB/32 DDR4 3200MT/s (64GB RAM total) to my Dell Latitude 5521. But it didn't start after the installation to my regret. The laptop was only blinking with 2,5 "Invalid Memory Installed" LED error and nothing more.Could anyone provide me with additional information how to make them work together? According to the specification ([URL] the laptop has to support up to 64GB of RAM, that's exactly my case.Current BIOS version is 1.20.0, by the way.
Latitude 5521, "Invalid Memory Installed" error