[SOLVED] 1 to 8 PWM fan splitter

[tommytgc]

So I want to make my pc a bit quieter but the problem is that I have fans connected to molex (I want to control my fans) as my mobo has only 2 case fan headers so I saw this on Amazon: https://www.amazon.com/Oranmay-Cooling-Splitter-Adapter-Braided/dp/B07R72514L so I want to know if these are safe to use or not? You connect one tho molex and the other to the mobo. They look sketchy and are really cheap as they go for around 6$. But you have to connect them to your mobo but I'm scared that it will fry my mobo. So are they safe or should I avoid them?
My mobo: Asus prime b250m-plus

 

[Flayed]

Looks like it should work I don't see why it would be unsafe.

 

[mortemas]

The thing I don't like about that style of fan hub is that the connectors are all exposed. There is an unguarded +12VDC pin on each one of those connectors that leads straight back to your PSU's 20, 30, 50+ Amp (?) 12V rail, which basically makes this device an unenclosed "fuse" that will blow if any one of those 12V pins comes in contact with something grounded within the PC case. My preference is for somthing a bit more protected, like this Silverstone hub:

https://www.amazon.com/SilverStone-...M+fan+hub&qid=1578763287&s=electronics&sr=1-3

Granted, the headers on your mobo are unguarded, but they are permanently fixed to their location. It's unusual that the supply side connector for PC fans is the male, while the device under load gets the female, but I suppose the safety risk is not quite as great as it is with 120V/240V AC household electricity which of course is always female at the wall outlet with the electrical contacts hidden within. Still, I think the Silverstone hub is a bit safer for what it's worth, and has a bit more of a polished look to it. If you go with the open hub just make sure it's fastened securely so it doesn't come loose, although some double-sided tapes do fail over time which again nudges me toward the hub with the closed design.

 

[Karadjgne]

Depends on your fans.

If you have pwm fans, they are a constant 12v and use the 4thwire to change speeds. So you can use any power source on the hub, it won't use header power, but the signal gets split to all the fans.

So that hub would would work well for control.

If you have regular 3 pin fans, that's different. They work on voltage changes, either 5v or 7v upto 12v. So you can't supply a constant voltage and get changes.

In order to get any control of 3 pin fans, you'd use a splitter, not a hub, and since power comes from the header, you don't want to use more than 1A of power, which is generally 2-3 fans depending on rating.

 

[tommytgc]

Depends on your fans.

If you have pwm fans, they are a constant 12v and use the 4thwire to change speeds. So you can use any power source on the hub, it won't use header power, but the signal gets split to all the fans.

So that hub would would work well for control.

If you have regular 3 pin fans, that's different. They work on voltage changes, either 5v or 7v upto 12v. So you can't supply a constant voltage and get changes.

In order to get any control of 3 pin fans, you'd use a splitter, not a hub, and since power comes from the header, you don't want to use more than 1A of power, which is generally 2-3 fans depending on rating.

I use argus rs-03 fans and also I want to add some be quiet pure wings to my pc.

 

[tommytgc]

The thing I don't like about that style of fan hub is that the connectors are all exposed. There is an unguarded +12VDC pin on each one of those connectors that leads straight back to your PSU's 20, 30, 50+ Amp (?) 12V rail, which basically makes this device an unenclosed "fuse" that will blow if any one of those 12V pins comes in contact with something grounded within the PC case. My preference is for somthing a bit more protected, like this Silverstone hub:

https://www.amazon.com/SilverStone-...M+fan+hub&qid=1578763287&s=electronics&sr=1-3

Granted, the headers on your mobo are unguarded, but they are permanently fixed to their location. It's unusual that the supply side connector for PC fans is the male, while the device under load gets the female, but I suppose the safety risk is not quite as great as it is with 120V/240V AC household electricity which of course is always female at the wall outlet with the electrical contacts hidden within. Still, I think the Silverstone hub is a bit safer for what it's worth, and has a bit more of a polished look to it. If you go with the open hub just make sure it's fastened securely so it doesn't come loose, although some double-sided tapes do fail over time which again nudges me toward the hub with the closed design.

Oh thanks but the shipping cost as much as the hub itself. Oh well

 

[mortemas]

I use argus rs-03 fans and also I want to add some be quiet pure wings to my pc.

OK, then the hub you want will work with both the Argus and bequiet fans since they are all 4-pin PWM.

 

[tommytgc]

OK, then the hub you want will work with both the Argus and bequiet fans since they are all 4-pin PWM.

Ok thanks!