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Rosewill Blackhawk Fans

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February 12, 2014 4:30:00 PM

Hello,

I have the Rosewill Midtower Blackhawk case. It comes with five fans. I have the F2 A85M-Pro Motherboard. Now 4 of the fans that's already pre-installed in the case has what I think is a 4 pin molex connector? I'm not entirely sure of the name of it. My question is where do I plug these in? On my motherboard there's only 3 "CHA_FAN" plugs and they look far too small for the one shown in the picture below.

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February 12, 2014 4:39:12 PM

Those fans are meant to connect directly to the PSU. The 5th fan has 3 or 4 pin mobo connector so that it can be varied by the user via mobo or software.
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February 12, 2014 4:45:54 PM

festerovic said:
Those fans are meant to connect directly to the PSU. The 5th fan has 3 or 4 pin mobo connector so that it can be varied by the user via mobo or software.


So the 5th fan cable I plug directly into the motherboard in any of the CHA_FAN plugs? And the big white ones I connect directly to the power supply?
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February 12, 2014 4:51:01 PM

That is in fact a molex connector, yes, and it plugs into your power supply directly. It'll mean your fan will run at full power unless you have an in-line resister, but if that's the only connection your fan has, that's what you get.
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February 12, 2014 4:51:44 PM

ragnorak222 said:


So the 5th fan cable I plug directly into the motherboard in any of the CHA_FAN plugs? And the big white ones I connect directly to the power supply?


That's correct, yes.
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February 12, 2014 4:53:38 PM

You might experiement on which fan header you use on the motherboard, sometimes the fan levels are more adjustable depending on which header is used (sys, Cha, etc)
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February 12, 2014 5:30:04 PM

festerovic said:
You might experiement on which fan header you use on the motherboard, sometimes the fan levels are more adjustable depending on which header is used (sys, Cha, etc)


The fan that plugs directly to the motherboard is the fan on the back right next to the I/O panel. Would there be an optimal plug to use for that one?
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February 13, 2014 3:38:17 PM

It really depends on the fan control software in your BIOS or system tuning software that came with the mobo. Its not really a big deal. If your fan is kinda noisy at 100%, maybe the sweet spot is 90%. But what if the mobo only allows certain headers to change the speed in 1% increments, and other fans are Off/Low/High? thats what im saying.
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February 13, 2014 8:09:12 PM

festerovic said:
It really depends on the fan control software in your BIOS or system tuning software that came with the mobo. Its not really a big deal. If your fan is kinda noisy at 100%, maybe the sweet spot is 90%. But what if the mobo only allows certain headers to change the speed in 1% increments, and other fans are Off/Low/High? thats what im saying.


Isn't it true that if it's not connected to the mobo you can't change the speed? Like if the fans were connected straight to the psu like in my case, they would only be able to go 100% correct?
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February 14, 2014 9:19:17 AM

That is correct. You can get a fan controller if you want to use Molex fans in your case, they are pretty cheap.

To be honest, I really prefer 3-4 pin fans vs molex, it seems the wiring on molex connectors is very very cheap on almost every manufacturers' fans. I've had PSU issues because of them before.
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