X370 K4 Stuck in single channel

RumbleP wrote: Thank you for your answer. I've just made the test to make sure. When I tried both on A2 B2 slots it bootloop and get stuck on 0d code. Pretty sure now that I have an issue with the board. Asrock support told me that I have to remove the cooler, the cpu and the ram and after to clear cmos and then put in everything back. I have a question. Could it be because my Water Cooling is higher then 95W? In the book it write that the cooler has to be lower then 95W

The cooling capacity of the CPU cooler has nothing to do with memory compatibility or memory over clock potential, except if it is too low. It is impossible to have too much cooling for a CPU. The more cooling you have, the better it is for a CPU.

Where does it say in the manual that the cooler has to be lower than 95W? Do you mean this from the specifications:

Supports 95W Water Cooling

That does not mean the CPU cooler cannot be better than 95W. The best Ryzen 7 processors have a TDP of 95W, and this and other ASRock AM4 boards will support CPU coolers that are capable of at least 95W. Some of the fan connectors on your board will provide enough power for custom water cooling pumps, that can provide much more than 95W of cooling even with small radiators.

That specification is a little confusing, but I can assure you that your CPU cooler's cooling ability is not causing your memory problem.

[URL=][/URL]I've just think about something that can cause this. I know that the guy who make my build have use a drill to enlage the holes where the cooler is mounting because my current cooler was not fitting. He looks under my board and said that there is not circuit. I was reticent but he said that there will be no problem. I also didnt see any circuit on the board, where the hole is located but could have one in second layer?

Edited by RumbleP - 09 Jun 2017 at 1:21pm

It looks like you are stuck with single channel on the board, it could be a lot worse I guess. 

The key with Ryzen in the fact that the infinity fabric runs at the same frequency as the RAM, dual channel makes no difference to that so it would make little to no difference if you swapped to a single 16gb module.