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Multiple fans on cpu header safe?

GlaZe08
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Go to solution Solved by Mister Woof,
15 minutes ago, GlaZe08 said:

Cpu header is 2A 24W 

 

Radiator fans 0.2 A * 3 = 0,6 1.32 W * 3 = 3,96 

3 rgb fans, 0.1A * 3 = 0,3 1.2 W * 3 = 3,6

1 stock fan,  doesnt say but prob same as others. So 0,9 A and 7,56W 

 

Also do you mean that the SATA pushes 4.5 amps into the cpu header???

You said your fan hub is powered by SATA, right? 

 

Then that hub should be 4.5A, while the cpu header should be 2A.

 

If I'm reading this right, the hub plugs into your motherboard fan header so that it can get the pwm signal to know what speed to run the fans on the hub at based on the motherboard sensors, but the actual power is being drawn from the SATA cable.

 

If you have 7 on it, it would draw from the 4.5a of the SATA cable.

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Hello!

 

Just build my first pc and realised i did not have a fan splitter for my 3 fans on AiO but i do have a little fan hub built into my case which is powered by SATA ( Fractal design meshify 2 ) Which i plugged all 3 into it and then the hub into cpu header. 
 

What im worried about is that my 4 case fans are also plugged into that hub. Which means i have 7 fans connected to the cpu header. I read the mobo manual and made sure all fans were under the max power and stuff but i just wanted to double check if this is safe to do, or will cpu header burn out.

 

Only negative thing with this seems to be that all fans speeds are adjusted based on cpu temp

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Read the manual to see how many amps your CPU header supports. Usually it's .75 to 3. That will do for when you get the splitter.


For SATA, IIRC it is 4.5amps. 

 

Usually fans use up .25amps. So do the math.

Before you reply to my post, REFRESH. 99.99% chance I edited my post. 

 

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8 minutes ago, Mister Woof said:

Read the manual to see how many amps your CPU header supports. Usually it's .75 to 3. That will do for when you get the splitter.


For SATA, IIRC it is 4.5amps. 

 

Usually fans use up .25amps. So do the math.

Cpu header is 2A 24W 

 

Radiator fans 0.2 A * 3 = 0,6 1.32 W * 3 = 3,96 

3 rgb fans, 0.1A * 3 = 0,3 1.2 W * 3 = 3,6

1 stock fan,  doesnt say but prob same as others. So 0,9 A and 7,56W 

 

Also do you mean that the SATA pushes 4.5 amps into the cpu header???

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7 minutes ago, GlaZe08 said:

Also do you mean that the SATA pushes 4.5 amps into the cpu header???

He means SATA power for example. afaik SATA and CPU usually sits on a different rail and it should not push that much amp to any of the board header.

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15 minutes ago, GlaZe08 said:

Cpu header is 2A 24W 

 

Radiator fans 0.2 A * 3 = 0,6 1.32 W * 3 = 3,96 

3 rgb fans, 0.1A * 3 = 0,3 1.2 W * 3 = 3,6

1 stock fan,  doesnt say but prob same as others. So 0,9 A and 7,56W 

 

Also do you mean that the SATA pushes 4.5 amps into the cpu header???

You said your fan hub is powered by SATA, right? 

 

Then that hub should be 4.5A, while the cpu header should be 2A.

 

If I'm reading this right, the hub plugs into your motherboard fan header so that it can get the pwm signal to know what speed to run the fans on the hub at based on the motherboard sensors, but the actual power is being drawn from the SATA cable.

 

If you have 7 on it, it would draw from the 4.5a of the SATA cable.

Before you reply to my post, REFRESH. 99.99% chance I edited my post. 

 

My System: i7-13700KF // Corsair iCUE H150i Elite Capellix // MSI MPG Z690 Edge Wifi // 32GB DDR5 G. SKILL RIPJAWS S5 6000 CL32 // Nvidia RTX 4070 Super FE // Corsair 5000D Airflow // Corsair SP120 RGB Pro x7 // Seasonic Focus Plus Gold 850w //1TB ADATA XPG SX8200 Pro/1TB Teamgroup MP33/2TB Seagate 7200RPM Hard Drive // Displays: LG Ultragear 32GP83B x2 // Royal Kludge RK100 // Logitech G Pro X Superlight // Sennheiser DROP PC38x

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4 minutes ago, Mister Woof said:

You said your fan hub is powered by SATA, right? 

 

Then that hub should be 4.5A, while the cpu header should be 2A.

 

What's currently plugged into your CPU fan header?

 

 

The fan hub and all fans

 

it says in the manual tho to connect hub to cpu or sys fan

7F95C9E9-1DB2-4291-A542-08C4C498965D.thumb.jpeg.385d14aa3df9ad8b828ea674868dc3c3.jpeg

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Just now, GlaZe08 said:

The fan hub and all fans

 

it says in the manual tho to connect hub to cpu or sys fan

7F95C9E9-1DB2-4291-A542-08C4C498965D.thumb.jpeg.385d14aa3df9ad8b828ea674868dc3c3.jpeg

Yeah, see my edits.

Before you reply to my post, REFRESH. 99.99% chance I edited my post. 

 

My System: i7-13700KF // Corsair iCUE H150i Elite Capellix // MSI MPG Z690 Edge Wifi // 32GB DDR5 G. SKILL RIPJAWS S5 6000 CL32 // Nvidia RTX 4070 Super FE // Corsair 5000D Airflow // Corsair SP120 RGB Pro x7 // Seasonic Focus Plus Gold 850w //1TB ADATA XPG SX8200 Pro/1TB Teamgroup MP33/2TB Seagate 7200RPM Hard Drive // Displays: LG Ultragear 32GP83B x2 // Royal Kludge RK100 // Logitech G Pro X Superlight // Sennheiser DROP PC38x

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2 minutes ago, Mister Woof said:

Yeah, see my edits.

ok ok so i should be fine then, nothing will die i hope

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35 minutes ago, Mister Woof said:

Yeah, see my edits.

In that case do i need to get a splitter or is it fine like this?

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6 hours ago, GlaZe08 said:

In that case do i need to get a splitter or is it fine like this?

It's probably fine - but running off different headers allows you more fine control over each set of fans since you can set the curve separately.

 

So if you want to the radiator fans to run at x curve because they're different rpm than the case fans, you can.

Before you reply to my post, REFRESH. 99.99% chance I edited my post. 

 

My System: i7-13700KF // Corsair iCUE H150i Elite Capellix // MSI MPG Z690 Edge Wifi // 32GB DDR5 G. SKILL RIPJAWS S5 6000 CL32 // Nvidia RTX 4070 Super FE // Corsair 5000D Airflow // Corsair SP120 RGB Pro x7 // Seasonic Focus Plus Gold 850w //1TB ADATA XPG SX8200 Pro/1TB Teamgroup MP33/2TB Seagate 7200RPM Hard Drive // Displays: LG Ultragear 32GP83B x2 // Royal Kludge RK100 // Logitech G Pro X Superlight // Sennheiser DROP PC38x

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On 4/24/2021 at 5:32 PM, Mister Woof said:

It's probably fine - but running off different headers allows you more fine control over each set of fans since you can set the curve separately.

 

So if you want to the radiator fans to run at x curve because they're different rpm than the case fans, you can.

Yeah i did order a Y splitter so i will plug radiator fans and case fans seperately

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