X370 Gaming Itx & 32GB RAM issue

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   I have an Asrock X370 Gaming Itx board with latest Bios (7.40). I have recently purchased a 5800x3d CPU and RAM - 32GB(2x16) G.Skill Ripjaw ddr4 3200 cl 16. Until now I had the same RAM but 2x8. The issue is that the board does not see both 16GB sticks - it does not reach Post and keeps resetting. From what I know the board supports max 32GB and has only 2 dimms but I cannot say which frequencies are ok for the new processor in Dual channel. I have tried the following:
- Clearing CMOS
- disabled and enabled xmp profile before installing the ram
- Used 1 stick at a time in both DIMMS which works
- Installed new ram in another PC with 4 dimms which worked, so both are ok
- Enabled and disabled Resizable BAR
- setting both auto and manually the frequency to 2133 and 3200 which works only for 1 stick at a time
- using 8+16 (old and new RAM) also does not Post 

Have any suggestions?

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ChefLeBoef Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 Mar 2023 Status: Offline Points: 20	Post Options Post Reply Quote ChefLeBoef Report Post Thanks(0) Quote Reply Topic: X370 Gaming Itx & 32GB RAM issue Posted: 10 Mar 2023 at 11:07pm
	I have an Asrock X370 Gaming Itx board with latest Bios (7.40). I have recently purchased a 5800x3d CPU and RAM - 32GB(2x16) G.Skill Ripjaw ddr4 3200 cl 16. Until now I had the same RAM but 2x8. The issue is that the board does not see both 16GB sticks - it does not reach Post and keeps resetting. From what I know the board supports max 32GB and has only 2 dimms but I cannot say which frequencies are ok for the new processor in Dual channel. I have tried the following: - Clearing CMOS - disabled and enabled xmp profile before installing the ram - Used 1 stick at a time in both DIMMS which works - Installed new ram in another PC with 4 dimms which worked, so both are ok - Enabled and disabled Resizable BAR - setting both auto and manually the frequency to 2133 and 3200 which works only for 1 stick at a time - using 8+16 (old and new RAM) also does not Post Have any suggestions?

threadzipper1957 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 05 Mar 2022 Status: Offline Points: 8020	Post Options Post Reply Quote threadzipper1957 Report Post Thanks(0) Quote Reply Posted: 14 Mar 2023 at 6:32pm
	The memory controlelr is integrated in the CPU, it is NOT on the board, and there is a direct link between pins from the socket and contacts in the memory slots. When the old memory modules work in dual channel, and the new CPU doesn't, it would be best to return the CPU, for replacement.
	Kind Regards