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Okay to put a 3-pin fan into a 4-pin header? (3-pin AP-15's)

post #1 of 15
Thread Starter 
Hi everyone. I am about to finalize my H50 push-pull intake setup with two GT AP-15 fans. My motherboard is an ASUS P6T SE which has a "3-pin PWR_FAN" + "3-pin CHA_FAN1" + "3-pin CHA_FAN2" and a "4-pin CPU_FAN."

Now I have it setup currently like this:

H50 PUMP --> 3-pin PWR_FAN
first AP-15 fan --> 3-pin CHA_FAN1
2nd AP-15 fan --> 4-pin CPU_FAN

The reason being my third CHA_FAN2 is being occupied. Would this be okay to put the 2nd AP-15 (that is a 3-pin) into a 4-pin connector? It seems to fit, but I was wondering would this be problematic for my cooling.
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post #2 of 15
Yep. No problem.
Just missing the wire that can adjust speed of the fan.
post #3 of 15
Thread Starter 
I see. Aren't my AP-15's supposed to run at MAX speed, anyway?
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post #4 of 15
If you want them to run max speed, hook them up to your psu.
    
CPUMotherboardGraphicsRAM
i7 D0 (3.8ghz @1.200v) EX58-UD3R GTX 670 XMS3 2GBx3 
Hard DriveOptical DriveCoolingOS
M4 128 + Raptor 300 x2 + F3 ASUS CNPS12X Win 7 x64/XP x86 
MonitorKeyboardPowerCase
Dual ASUS 25.5" Shine X650 FT02 
MouseMouse Pad
G9X FUNC 1030 ARCHETYPE 
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CPUMotherboardGraphicsRAM
i7 D0 (3.8ghz @1.200v) EX58-UD3R GTX 670 XMS3 2GBx3 
Hard DriveOptical DriveCoolingOS
M4 128 + Raptor 300 x2 + F3 ASUS CNPS12X Win 7 x64/XP x86 
MonitorKeyboardPowerCase
Dual ASUS 25.5" Shine X650 FT02 
MouseMouse Pad
G9X FUNC 1030 ARCHETYPE 
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post #5 of 15
You can still adjust to speed with 3 pin.
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post #6 of 15
Thread Starter 
Would hooking them up to the PSU mean connection via molex adapters? The AP-15's came with them, but I was not sure whether to use them or not.

What's the best way to do this? Should they be running at max for push-pull on a H50?
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post #7 of 15
Quote:
Originally Posted by Kabigon View Post
Would hooking them up to the PSU mean connection via molex adapters? The AP-15's came with them, but I was not sure whether to use them or not.

What's the best way to do this? Should they be running at max for push-pull on a H50?
Yes and yes, the pump for sure should be, the fans can be hooked up to the CPU port if you want to be able to adjust them for sound.
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post #8 of 15
Quote:
Originally Posted by Kabigon View Post
Would hooking them up to the PSU mean connection via molex adapters? The AP-15's came with them, but I was not sure whether to use them or not.

What's the best way to do this? Should they be running at max for push-pull on a H50?
Depends how tolerant you are for noise. If you don't care and want max performance, hook them up to the psu. Otherwise, you hook them up to the mobo and adjust the speeds through software.
    
CPUMotherboardGraphicsRAM
i7 D0 (3.8ghz @1.200v) EX58-UD3R GTX 670 XMS3 2GBx3 
Hard DriveOptical DriveCoolingOS
M4 128 + Raptor 300 x2 + F3 ASUS CNPS12X Win 7 x64/XP x86 
MonitorKeyboardPowerCase
Dual ASUS 25.5" Shine X650 FT02 
MouseMouse Pad
G9X FUNC 1030 ARCHETYPE 
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CPUMotherboardGraphicsRAM
i7 D0 (3.8ghz @1.200v) EX58-UD3R GTX 670 XMS3 2GBx3 
Hard DriveOptical DriveCoolingOS
M4 128 + Raptor 300 x2 + F3 ASUS CNPS12X Win 7 x64/XP x86 
MonitorKeyboardPowerCase
Dual ASUS 25.5" Shine X650 FT02 
MouseMouse Pad
G9X FUNC 1030 ARCHETYPE 
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post #9 of 15
Thread Starter 
Where should the pump go, then?
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post #10 of 15
Pump uses that molex converter to allow it to be plugged right into the PSU
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