Help with an odd fan/motherboard problem

[Growlingfish]

Hey guys - I've just encountered a problem that I don't really understand. I have a Gigabyte G-Power Pro cooler on my AW8 board, and I'm using the fan controller that came with the cooler. Last night my PC woke me up with lots of beeping and it seemed that the fan on the cooler had stopped, so I shut it down, fell asleep again and then came back to it this morning. Now this morning the cooler was working fine until about 20 minutes ago when the same thing happened, so I restarted without the fan controller connected to the cooler (it then runs at max speed), but for some reason without the controller connected the motherboard won't find my master HD. If I plug the controller back in then it will detect it without any probs. So I guess the question I'm asking is: is it most likely that the cooler, PSU or board is bad if the cooler just randomly stops working, and the second question is why does one of my hard drives become invisible when I unplug the fan controller?

Thanks!

Edit: manual for the cooler is here if you want to see how the CPU fan controller fits in.

2nd Edit: OcUK product page link changed

 

[Growlingfish]

Just going to bump this once because I realise its a weird query. I guess the question that might be able to be answered more conclusively is why my board won't detect my 2nd HD when I unplug the CPU cooler fan controller?

 

[MAllen]

Truely bizzarre..

Now the link to the cooler is dead due to the OCUK web designer being on drugs and confusing us all. (Bit like when the rearranged my local Asda... I still can't find half of my usual stuff...)

Here are things I would be trying....

1\ Test that PSU. Any chance of getting hold of a PSU tester? OR swapping PSUs? Or at least, unplug your DVD/CD drives, floppy, etc. Give it a bare minimal load. Now see if it will boot up and detect that Hard Disk.

2\ Is your hard disk on "Cable Select"? Swap it to "Master"/"Slave" instead.

3\ Do you have one of them "3-pin to Molex" fan power connectors? Try using this for your CPU fan.

4\ How do the voltages look in the BIOS? What about when you are in Windows (using speedfan or simliar). Do they go more than 10% out when under load?


All of the above are interlinked. As your fan controller will be reducing the load required to run the CPU fan, maybe your PSU is starting to fail. And now not correctly supplying the required load to the motherboard. Meaning the motherboard then freaks out the rest of the components.

Just a thought

 

[Growlingfish]

It's strange but I cannot reproduce the problem now, even though I did it several times over the course of the day yesterday. Voltages are rock solid and I can now unplug the controller without losing the HD. I'll keep my fingers crossed that the PC was just having a weird moment ... Thanks for the reply!