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H100 with Noctua Nf-f12 Temps

post #1 of 6
Thread Starter 
I have an h100 with two Noctual NF-f12 fans hooked up in a pull configuration pulling the air out of the top of my case.

I hooked the NF-f12 fans to the CPU-FAN and OPT_FAN using two LNA adapters so it should be using PWM.
However when I run Prime95 the max RPM the fans go range from 700-800 when it should have a max of 1200rpm with the LNA on.

Am I doing something wrong? Why are the fans not running at a higher speed at full load. My temps are about 10 - 20 degrees higher than when I'm running the h100 stock fans just because of the RPM. I know that the Noctua fans are meant to be silent but why would it not run at max speeds when my temps are reaching 80-90 degrees frown.gif
post #2 of 6
It is my understanding that the LNA's are just resistors.

Now, I dont know if you are using BIOS fan controls, or some other software, but the fans wont hit 1200RPM without a 100% PWM signal.

I would remove the LNA's and adjust your fan controls to get your desired performance.

Also, I'm curious why you are running Pull fans only. I think you would get better cooling if you went to Push.
Edited by Baskt_Case - 5/22/13 at 11:36pm
    
CPUMotherboardGraphicsRAM
FX-8350 @ 4.6GHz 1.48v 990FXA-UD3 Pegatron HD6450 1GB 2x4GB G.Skill Sniper 1866 
Hard DriveOptical DriveCoolingOS
WD Blue 500GB Samsung DVD-RW Corsair H100i Win 7 x64 
MonitorPowerCase
LG 32" 720p HDTV SeaSonic M12II 620 Bronze CM 690 II Advanced 
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CPUMotherboardGraphicsRAM
FX-8350 @ 4.6GHz 1.48v 990FXA-UD3 Pegatron HD6450 1GB 2x4GB G.Skill Sniper 1866 
Hard DriveOptical DriveCoolingOS
WD Blue 500GB Samsung DVD-RW Corsair H100i Win 7 x64 
MonitorPowerCase
LG 32" 720p HDTV SeaSonic M12II 620 Bronze CM 690 II Advanced 
  hide details  
Reply
post #3 of 6
Push before pull, pull fans should only be added once you have a push setup. Also the LNAs are just resistors and work as advertised when you aren't using PWM. If you tweak your mobo's fan settings properly you'll have your noise problem solved and your fans will be capable of performing at max.
post #4 of 6
Yea, I was thinking the LNA's would only be useful if you had no other way to control the fans.
    
CPUMotherboardGraphicsRAM
FX-8350 @ 4.6GHz 1.48v 990FXA-UD3 Pegatron HD6450 1GB 2x4GB G.Skill Sniper 1866 
Hard DriveOptical DriveCoolingOS
WD Blue 500GB Samsung DVD-RW Corsair H100i Win 7 x64 
MonitorPowerCase
LG 32" 720p HDTV SeaSonic M12II 620 Bronze CM 690 II Advanced 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
FX-8350 @ 4.6GHz 1.48v 990FXA-UD3 Pegatron HD6450 1GB 2x4GB G.Skill Sniper 1866 
Hard DriveOptical DriveCoolingOS
WD Blue 500GB Samsung DVD-RW Corsair H100i Win 7 x64 
MonitorPowerCase
LG 32" 720p HDTV SeaSonic M12II 620 Bronze CM 690 II Advanced 
  hide details  
Reply
post #5 of 6
Thread Starter 
So I removed the L.N.A's and changed my configuration to Push however my CPU fan still caps at 700-800 rpm when running intel burn test or Prime 95. frown.gif It seems like the PWM is not sending a 100% PWM signal even when my computer is on full load. Anyone else experiencing something similar?
post #6 of 6
You need a pwm Y splitter and connect it to CPU_FAN.
You dont need L.N.A if its controlled via the mb doh.gif
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