X370 K4 Stuck in single channel

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. 

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

[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

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.

RumbleP wrote: Good afternoon! I'm new here. Before I explain my problem, I just want to tell that my english is not perfect, but I will do my best to make me understand So, I just bought a new motherboard, a new processor and new ram: Motherboard: Asrock X370 Gaming K4 Processor: Ryzen 5 1600X RAM: G.Skillz F4-3000C15D-16GTZ BIOS: 2.40 (lastest update) I've made some test during the last days. Everything run smooth except the RAM. I'm stuck in Single Channel in the bios. My ram are in the a2-b2 slots.  As soon as I change the frequency in the bios, my computer start to bootloop like power on power off and after It starts and the frequency is stuck to 2133 and in Windows, it says that I have 16Gb, but 7.5Gb usable. I've tried with other RAM (Geil EVO X 16GB 3200) and I'm having the same issue I'm desperate, I don't know what to do

First, the Ryzen memory controller does not support a memory speed of 3000. It must be set to 2933 maximum instead.

Memory compatibility and problems are the main issue with Ryzen boards.

The boot loop, power on and off cycling is the AMD Advanced Boot Training feature, that is performing memory training. That happens with Ryzen systems when it detects the memory will not work at higher speeds. The AMD Advanced Boot Training feature is an option in the OC Tweaker screen.

Are you only changing the memory speed/frequency? You should be setting the DRAM voltage to 1.35V when you set the memory speed above 2133/2400.

The XMP profile on the G.SKILL memory was designed for Intel Z170 and Z270 boards, and will not usually work on a Ryzen system. Check the QVL list here:

https://www.gskill.com/en/product/f4-3000c15d-16gtz

Some memory like this that was designed for Intel systems will work with Ryzen, but normally that is memory that uses Samsung memory chips.

Have you tried both memory sticks/DIMMs of both memory models in the B2 memory slot?

Are you sure that the memory was completely seated in the B2 slot?

Since you have the same problem with the B2 slot with both models of memory, it is possible that the board has a problem.