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Join Date: Jun 2006
Location: Sydney, Australia
Dark Rock Pro 4 - 120mm fan not spinning
I purchased my new rig last night and it all works fine, except this one thing: the 120mm fan on the outside of the cooler is not spinning.
When I put all the stuff together, I was eager to get going so at first I did not notice the Y-splitter that came with the cooler. I ended up plugging the middle fan into the "CPU_FAN" header, and the outside fan into the "CPU_OPT" header.
I now understand from looking online that the "CPU_OPT" header is for voltage-controlled cans, whereas the 120mm Silent Wings 3 that was attached to the outside of the cooler is a PWM fan (they're both PWM fans).
I've tried plugging the fan into a couple of the SYS_FAN headers, and I've tried swapping them over in the Y-splitter that I installed once realising my original mistake to no avail. It still won't spin.
When I first put it in there, if I gave it a little nudge with my finger, it appeared as if it received some power momentarily, and it DID spin for about half a second, then stopped again.
- Is it possible I broke the fan by plugging it into the CPU_OPT header initially?
- Is it possible that the fan may be DOA? Is this a common occurrence with fans?
I want to know whether there's anything I can try to resuscitate it, or whether I should submit an RMA for it. Ideally it'd be great to be able to fix it rather than mess around with RMAs but if I have to then so be it.
The temperatures are good with just the middle fan (push-pull) blowing to the exhaust of the case for now, but obviously I'd like that second fan to be there for the extra cooling.
Any help would be greatly appreciated! Thank you!
Last edited by jNSKkK; 04-15-2019 at 07:21 PM.