Should I use a Molex to 3/4 Pin Fan Splitter or Y Fan Splitter that will be from motherboard?

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Surajsharma

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Mar 4, 2015
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So I bought a CoolerMaster JetFlo 120 MM fan for cooling my system but my motherboard only have 1 CPU_Fan header and 1 SYS_Fan header. So I am wondering it would be better to use as said in above title. I already have 80 MM fan as exhaust connected to SYS_Fan header. I can control both the fan speeds of CPU and SYS fan via my motherboard BIOS. So can I control both the 80 MM exhaust fan and 120 MM CoolerMaster fan if I use a Y-Splitter? The CPU fan have 4 wires it means that it is PWM fan and my exhaust fan have 3 pins connected to 4 pin SYS_Fan header on my motherboard. The CoolerMaster fan that I have bought have 4 pins on it and I can see 4 wires coming from the CoolerMaster fan and I also got 2 adapter cables in the fan box. On one it is written 1200 RPM adapter and on second adapter cable it is written 1600 RPM adapter and both the adapters have 3 wires in them, the 4th wire is absent in both the adapters. So how should I set it up? Y-Splitter or Molex to 3/4 PIn adapter??

My motherboard is Gigabyte GA H110M DS2, this motherboard have 2 versions one in DDR3 and one in DDR4, so I have the DDR4 version. On Gigabyte website the naming for DDR4 is not mentioned so don't get confused :p
 
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Hey there,

I'm not sure if I can answer this. but I'm sure can recommend you something.
First regarding fan speed, a splitter will do just fine, but the two fans will act like single fan. Whenever you set speed in BIOS it will apply on both fans. also there might be chances of speed loss due to spliting, but that should not be an issue.
why you want to control fan speed? by your name you appears to be Indian and its hot country just go with the full speed.
If you power the fans from the PSU directly (with molex cable) without a fan controller they will run full speed all the time or you will need to get a controller.
I personally using Circle 120mm fan for my setup and powering it up from PSU and they are quite silent. while gaming I...
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Dronzer Dragneel

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May 13, 2016
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Hey there,

I'm not sure if I can answer this. but I'm sure can recommend you something.
First regarding fan speed, a splitter will do just fine, but the two fans will act like single fan. Whenever you set speed in BIOS it will apply on both fans. also there might be chances of speed loss due to spliting, but that should not be an issue.
why you want to control fan speed? by your name you appears to be Indian and its hot country just go with the full speed.
If you power the fans from the PSU directly (with molex cable) without a fan controller they will run full speed all the time or you will need to get a controller.
I personally using Circle 120mm fan for my setup and powering it up from PSU and they are quite silent. while gaming I can feel the hot air coming out. so its doing job and I'm happy with them.

Note: I'm also Indian.
 
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Surajsharma

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Mar 4, 2015
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I see. then I will got with Molex to 3/4 pin adapter. BTW you are right I am Indian :bounce::p:D

If you don't mind I will keep this post open for a week and if nobody answered then I will select yours as solution
 
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Dronzer Dragneel

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May 13, 2016
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no problem at all..I'm not helping you for best answer tag..as it's not gonna give me any rewards..just trying to gather knowledge...and yes keeping this post open for a while is actually a good idea..cheers
 
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