PC Processors

[taifyn13]

Motherboard ASUS PRIME B550-PLUS
Processor AMD Ryzen 9 5900X
Video card RTX 3090
Power unit AeroCool KCAS PLUS 800W
Random access memory ADATA XPG GAMMIX D45 [AX4U360016G18I-DCBKD45] 

I bought faster RAM , but overclocking 3600 MHz does not hold . What should I do to overclock the 3600 MHz RAM declared by the manufacturer ?

[misterj]

taifyn13, the AMD 5900X specification says:

"System Memory Specification up to 3200MHz"

You can ask AMD here. Enjoy, John.

[elstaci]

Your Asus Motherboard supports 3600Mhz with your 5900x Processor: https://www.asus.com/motherboards-components/motherboards/prime/prime-b550-plus/techspec/

First do a CMOS CLEAR to reset your BIOS back to factory Defaults.

Have you tried manually in BIOS Settings overclocking your RAM to 3600Mhz?

It should have a Pull-Down Speed Menu to choose 3600Mhz and the go to FCLK and set that at 1800Mhz manually without using DOCP. See if it stays or not.

Seems like BIOS sees something wrong with you setting your RAM at 3600Mhz and then reverts it back to its SPD speed as a safety measure.

According to Adata Memory Finder under your Asus Motherboard your RAM is not listed as being compatible: https://corp.adata.com/uk/support/dms/#result

Those RAM Numbers are the closest ones to your RAM Part number.