Question Coolermaster MasterLiquid ML240 & Master Plus app

[Chkontog]

I have the Gigabyte B550 GAMING X V2 (rev. 1.0) mobo, and i have connect to cpu_opt fan header, the Coolermaster MasterLiquid ML240 liquid cooling system.
I am runing the Master Plus app and it shows me that "No compatible devices found".
What is the problem?

 

[Ralston18]

Could be hardware, software, or configuration. Or some combination....

= = = =

What devices are installed?

Update your post to include full system hardware specs and OS information.

What hardware/software requirements are listed by Master Plus app?

Any error codes in Reliability History/Monitor or Event Viewer?

More details needed.

 

[dwd999]

Did you try swapping the connections on the cpu_fan and cpu_opt connections? The app may just be looking at the cpu_fan connection and may not see the cpu_opt connection.

 

[Chkontog]

Did you try swapping the connections on the cpu_fan and cpu_opt connections? The app may just be looking at the cpu_fan connection and may not see the cpu_opt connection.

It was my fault.I had put the pump 3-pin connection, to cpu_fan, not to cpu_opt.I put it to cpu_opt and keeps rebooting.

Could be hardware, software, or configuration. Or some combination....

= = = =

What devices are installed?

Update your post to include full system hardware specs and OS information.

What hardware/software requirements are listed by Master Plus app?

Any error codes in Reliability History/Monitor or Event Viewer?

More details needed.

The only coolemaster devices that i have installed is my keyboard, and the mouse.
I have installed Windows 11 24H2 and my CPU is the AMD Ryzen 7 5700G, with 32GB RAM at 3600 mhz.
Also, the Reliability History/Monitor it doesn't have any error.

 

[Ralston18]

"Do over".

Is all important data backed up to locations away from the problem computer? Verify that the backups are recoverable and readable.

Verify that the correct drivers are installed for the keyboard and mouse.

Try running "dism" and "sfc /scannow" to find and fix buggy or corrupted files.

https://www.windowscentral.com/how-use-dism-command-line-utility-repair-windows-10-image

https://www.lifewire.com/how-to-use-sfc-scannow-to-repair-windows-system-files-2626161

= = = =

Re-read and review the entire motherboard's User Guide/Manual. Double check all connections and configurations. Do the same for all other component documentation.

Then following the procedure provided in the motherboard's User Guide/Manual, reset the system.

The objective simply being to allow BIOS and the OS to start afresh, find all installed devices, and boot accordingly.

 

[Chkontog]

"Do over".

Is all important data backed up to locations away from the problem computer? Verify that the backups are recoverable and readable.

Verify that the correct drivers are installed for the keyboard and mouse.

Try running "dism" and "sfc /scannow" to find and fix buggy or corrupted files.

https://www.windowscentral.com/how-use-dism-command-line-utility-repair-windows-10-image

https://www.lifewire.com/how-to-use-sfc-scannow-to-repair-windows-system-files-2626161

= = = =

Re-read and review the entire motherboard's User Guide/Manual. Double check all connections and configurations. Do the same for all other component documentation.

Then following the procedure provided in the motherboard's User Guide/Manual, reset the system.

The objective simply being to allow BIOS and the OS to start afresh, find all installed devices, and boot accordingly.

I tried all that you told me, but it didn't work.The 3-pin pump header, is going to the 4-pin fan header.Maybe, is it that the problem?

 

[Ralston18]

Yes - that could be the problem.

There may be other things wrong.....

You must use the motherboard's User Guide/Manual and the applicable documentation for all installed components to work out the proper connections to be used.

3 pin to 4 pin connections may not match in some manner. They must match to 1) work and/or 2) not damage anything.

Pay close attention to how the headers are identifed/labled in the documentation and on the motherboard.

All too easy sometimes to misread the print and make a connection that allows electrical energy to go where it should not go. Or too much/too little.....

Be sure to use only the cables that come with the installed PSU - that also matters.

 

[Paperdoc]

Here is something they almost never tell you in the manuals, and I don't know why! You are CORRECT to plug the 3-pin connector of the PUMP into the CPU_FAN header, and the two 4-pin FAN cables into the CPU_OPT header. But here comes the "trick". In BIOS Setup go into the CPU_FAN header that the pump is connected to. See your mobo manual on p. 31 under Smart Fan 5 Fan Control Mode. Make sure this is set to PWM Mode. When that is done, the pump will always receive from the header a full 12 VDC power supply and always run full speed as it is designed to do. If you leave this item in the default setting of "Auto" the header will set itself to Voltage Control Mode and force the pump to run SLOW when it starts up cold, just what a pump should NEVER do!

 

[Chkontog]

I made a little mistake here.Initially i had connect the pump header to the cpu fan header.I changed that and now i have connect the pump header, as the manual correctly says, to cpu opt header,Also, the pump header has a 3-pin connector and the cpu opt header is a 4-pin.I don't know what is the problem, maybe the mobo isn't compatible with the specific liquid cooler, i don't know .

 

[Paperdoc]

3-pin pump connector and 4-pin fan header is NOT a problem here. But Do change so that the PUMP is in the CPU_FAN header, and the rad fans are on the CPU_OPT header. Then ensure the CPU_FAN header is set to PWM Mode. Its Fan Speed Control should be set to Normal.

To help you understand why, some details. First, because of the design differences between an older 3-pin fan and the newer 4-pin type, when you plug an older 3-pin fan into a header using the new 4-pin PWM Mode of control signals, that older fan cannot have its speed controlled. Instead it always runs full speed. And it happens that is exactly what you WANT to happen with this AIO system. Its pump is wired just like an older 3-pin fan, so it runs full speed when done this way. Second, the CPU_OPT header really is just a mirror of the CPU_FAN header and does exactly the same thing. So when the rad fans are connected there, they ARE fed the correct speed control signals and CAN be controlled because they are the newer 4-pin design.

Lastly, the CPU_FAN header has an important second function. Although it does not use the speed of its "fan" (in your case, the pump) to control that speed, it DOES monitor that signal for NO signal, which would indicate failure. If that happens, it pops up a prominent warning on your screen so you know you need to fix that. But MOST mobos do much more with the CPU_FAN monitoring process. Within a short time of detecting failure there, they will shut down your system entirely without even waiting for the temperature sensor inside the CPU chip to show high temps. This is to protect the expensive CPU chip from permanent damage due to rapid overheating, which is exactly what happens when the CPU gets NO cooling. Further, it may refuse to let you start up if it gets no speed signal from its "fan" at any power-on. Now, with an AIO system, the most critical component is the PUMP. If it fails there is NO movement of heat from CPU chip to rad and NO cooling of the CPU. But if the pump is running and one or both rad fans fail the cooling is poor and the CPU may overheat slowly. This would be detected by another safety system and cause slow-down or shut down later, but no CPU damage. So the PUMP should be the item connected to CPU_FAN so that protection system can do its job.