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H150i Fan TAC Lead Cable


tjstratton
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I was just on the phone for over an hour with support on why Corsair started manufacturing their H150i with only a positive FAN TAC lead wire. I have a H150i that failed so I got another one and it had only a positive wire. My original H150i had both a positive and negative wire(like every other fan cable made). I returned the unit because I thought it was a defect but now the second replacement also has only one wire. My old unit worked fine when it worked but this new unit lights up red indicating a problem and there is also an error on my Asus Hero XI.

 

Does anyone know how to get this to work because it seems it is by design from Corsair. My case is being escalated because the tech I was talking to didn't know why this cable was like this either. It would be nice if they amended their user manual.

Edited by tjstratton
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Yes, one wire and that’s why it’s called the TAChometer connection. It reports a speed to the Motherboard and that’s it. All power comes from the SATA line.

 

If the tach wire is damaged, it might produce a CPU Boot error. However, this would not cause the pump to turn red. Only a genuine temp event or pump failure should trigger that. This unit does appear to have a problem, but it’s not going to be the tach wire. You can cut that off with a pair of scissors and as long as you stick something on cpu fan or turn off the boot error protection in the BIOS, you still boot up. In more practical terms, the best troubleshooting might be just that — off the cpu block and powered out the back via the SATA to assess if the pump is really running. However, when you get the boot error and are connected, it usually means there is an electrically dead device on the other end.

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