Normal sidefan need a push/nudge to start

SilverDealer

Honorable
Jan 1, 2014
36
0
10,540
Hi,

So I've got a brand new pc and decided to go all out with the it and mount all possible fans. And do so by using a Y-splitter in order to attach two fans for my three SYSTEMFAN slots. So far it's been going great except for the SYSTEMFAN 3 where I connected a three pin connector from my CPU cooler and for the other a three pin connector for my PC fan. However, the y-splitter takes 2 pins from one and 3 from another; so I used 2 pins for fan and 3 pins for cpu cooler since I deemed it a priority. See picture here, http://www.proshop.dk/mediacontent/27/05/270558o.jpg - only one yellow cable.

Now to my issue, the connected side-fan almost never starts on its own. When I boot my pc and even start a game nothing happens. However, as soon as I basically move the fan in either direction with a tooth pick or something due to it being on the side and very easily accessible - it starts spinning in the same direction and keeps doing so until the next pc re-boot. Heck the force it receives from me opening the case gets it spinning.

Anything I should be worried about and/or fixes? I've tried to reconnect the cables a couple of times with no changes. The CPU fan slots 1 and 2 are both occupied by 4 pin connectors for the two fans that come with my cooler. There's no splitter or alike there. Just one fan per fan slot.

140mm Silent Series R2 fan, 1000 RPM speed
Corsair H100i CPU Cooler
MSI X99S GAMING 9 AC EATX LGA2011-3 Motherboard
 
Solution
you would need to look at your fan speeds while running you cpu at full bore. if the fans do not spin at max speeds then yes they are not getting enough voltage.

there is only so much voltage coming off of that original MB connector so yes they are splitting it.

you can always get one of these

http://www.newegg.com/Product/Product.aspx?Item=N82E16812311003

basically at this poiint you need to control the voltage to the fan. It will run at 5v 7v or 12v.

an article like the below may help you decide what to do

http://www.hardwaresecrets.com/article/How-to-Create-a-Three-Speed-Fan-Control-without-Spending-a-Dime/496/3

there are many other articles out there on how to split and control fan voltage also. like start with 12v and...

SilverDealer

Honorable
Jan 1, 2014
36
0
10,540
Thanks for the quick help, I have an "Corsair 860W 80+ Platinum Certified Fully-Modular ATX Power Supply" and am a bit skeptical towards connecting the fan to the PSU considering it'll be on all the time 100% then unless I get a fan controller but that seems all excessive since only one single fan is having an tiny issue that I can live with.

So the not enough energy part, just need reassurance it does not affect the CPU pin on my system fan 3 slot, in other words; Is the side-fan the only one getting less voltage and the CPU cooler is getting enough?
 

fkr

Splendid
you would need to look at your fan speeds while running you cpu at full bore. if the fans do not spin at max speeds then yes they are not getting enough voltage.

there is only so much voltage coming off of that original MB connector so yes they are splitting it.

you can always get one of these

http://www.newegg.com/Product/Product.aspx?Item=N82E16812311003

basically at this poiint you need to control the voltage to the fan. It will run at 5v 7v or 12v.

an article like the below may help you decide what to do

http://www.hardwaresecrets.com/article/How-to-Create-a-Three-Speed-Fan-Control-without-Spending-a-Dime/496/3

there are many other articles out there on how to split and control fan voltage also. like start with 12v and reduce it to 7v, this will set your fan speed by voltage and is hoe 3 pin connectors work as compared to 4 pin.
 
Solution