Custom made molex cable causing PSU freeze?

[ozzaman]

Hi

I recently made a custom 1.2 metre cable which I am running to a D5 pump and a fan controller which controls 6 fans.

The strange problem I am having though is that I get random hard freezes when gaming or benchmarking. My pc will freeze, the sound will buzz and then the system needs a hard reset before coming back to life.

I changed PSU and didnt use the custom molex wire that I had made and the system ran fine.

I also used my original PSU and was able to use one of the original molex connectors provided and connected the pump and fan controller. This too worked.

The only variable seems to be the custom made cable which I was using.

Has anyone else encountered this?

The PSU i have is a Corsiar HX750i.

Many thanks.

 

[ozzaman]

I used 18 AWG wire. I dont have the equipment to test for voltage drop or resistance unfortunately.

 

[ozzaman]

The actual pump and fans run fine with the longer cable.

But I have now been able to run the system for a couple of hours with the original Corsair Molex cable and there haven't been any crashes. Not entirely sure what is causing the PSU to freeze, but the longer cable I have made does seem to be doing something weird.