- Aug 23, 2015
- 28
- 0
- 10,530
Hey guys!
To start here's my setup.
Mobo- Crosshair Formula V
CPU- AMD FX 8320
GPU- Zotac GTX950
Cooling- Swiftech H240x with additional 240
Fans - 7*120's, 3*80's,1*60
Power- Crosair HX850
So I just got these new "Works" fans from Micro Center. There very very loud lol, 240CFM @ 5200RPM at a whopping 64dbs lol. Now I got these cuz if i want the cooling power i have it. I want to run these off a fan header so there controlled by FanXpert. The problem is, these pull 36 watts!! My headers can only do 12W a piece. My thought is to use the fan header to control a mosfet. So those fans can get power directly from the PSU. I need some help on how to wire this up. I made a couple schematics of where I am leaning but bare with my i may be way off. Let me know what I need to change or which I should do.
I'm leaning towards the third one with the Zener, although I kinda wanted to throw an isolation optocoupler in there to protect my PC but I only have NPN Optos and N channel Mosfets. So I'm not sure how to do that. Will this work- NPN opto - PNP - Nchannel? Only way I see the opto working is opto-comparitor-mosfet. Would that be better then bellow?
P.s. I forgot all 12V and GND points going to fan will be directly from psu not from header like in diagrams. Sorry
Thanks
To start here's my setup.
Mobo- Crosshair Formula V
CPU- AMD FX 8320
GPU- Zotac GTX950
Cooling- Swiftech H240x with additional 240
Fans - 7*120's, 3*80's,1*60
Power- Crosair HX850
So I just got these new "Works" fans from Micro Center. There very very loud lol, 240CFM @ 5200RPM at a whopping 64dbs lol. Now I got these cuz if i want the cooling power i have it. I want to run these off a fan header so there controlled by FanXpert. The problem is, these pull 36 watts!! My headers can only do 12W a piece. My thought is to use the fan header to control a mosfet. So those fans can get power directly from the PSU. I need some help on how to wire this up. I made a couple schematics of where I am leaning but bare with my i may be way off. Let me know what I need to change or which I should do.
I'm leaning towards the third one with the Zener, although I kinda wanted to throw an isolation optocoupler in there to protect my PC but I only have NPN Optos and N channel Mosfets. So I'm not sure how to do that. Will this work- NPN opto - PNP - Nchannel? Only way I see the opto working is opto-comparitor-mosfet. Would that be better then bellow?
P.s. I forgot all 12V and GND points going to fan will be directly from psu not from header like in diagrams. Sorry
Thanks
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