How to limit memory frequency in DL 360e Gen8?

[dagger_nn]

Hi, I have several servers HP DL 360e Gen8. Also I have several DDR3 memory modules for it but with different frequency - some with 1333 MHz and some with 1600 MHz. How can I limit all modules to 1333 MHz? I tried to do it from BIOS (Server Options during startup) but 1600 MHz modules still working at this frequency.

Thanks

[Buddika2017]

Please refer  DL 360e Gen8  quick spec: General Memory Population Rules and Guidelines  
Link: https://www.hpe.com/h20195/V2/Getdocument.aspx?docname=c04128167