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Asus P8P67 low fan speeds & temp questions

post #1 of 7
Thread Starter 
I finally plugged my pc for the first time and I have questions about temps and fan control. Am I understanding it correctly that Asus motherboards can't control fan speed on a 3 pin fan? The only 4 pin connections on the motherboard are for the CPU and rear chassis fan. None of the Noctuas have this, and I knew this ahead of time. The two front 120 fans are plugged into a chassis fan with a Y splitter that I modified by removing one of what normally is a yellow wire (I used a NZXT black sleeved splitter). The fan speeds are being reported, but switching Q-Fan control on and off and changing fan profiles to turbo aren't having any effect on fan speed. The fan speed isn't always exactly the same, but it seems low. The CPU fan speed is being reported as 1260+-RPM, but the 3 chassis fans are only about 1020+ max.

When I first went into BIOS, the CPU temp was 38, then 39, and now it's mostly at 40. I've seen 41 max. MB temps are 31 max.

Specs are in my sig, but this seems high to me, especially since I'm just in BIOS and haven't put it under any kind of load. It's difficult for me to search right now, because I'm using a mini netbook. If someone knows how to turn up the fan speed in the Asus BIOS, please help me out. I was under the impression that they'd be running at max, which is fine with me. The Noctua low noise adapters are not plugged in. The box says they should be running at 1300 RPM. confused.gif

This is all totally new to me and pretty overwhelming. I'd appreciate any assistance, thanks!
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post #2 of 7
Since your Noctua fans are plugged in the motherboard the will cool when the cpu gets more load and heats up thats where the fans kick in and cool it down with higher rpm. Other think you can do download the asus fan control, or just by a fancontroller so you can set speeds manual
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post #3 of 7
CPU fan cant spin more because it is 1300RPM fan
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post #4 of 7
Well, your CPU is running at its full clock speed in BIOS (I do not think the energy saving kicks in until you are in OS), so you should expect higher temps. (This is an uneducated guess and I stand to be/would love to be corrected if wrong so I don't spread misinformation)

Even if that is not the case, I have noticed that in BIOS, my temp is ~40C but in OS, it drops to mid 30's which is fine by me.

Also, use the ASUS AI suite (well, just the fan Xpert if you so desire). In there, you can modify the temperature curve to adjust fan speed based on temps. If that still doesn't help, it looks like it might be time you got yourself a 4-pin...
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post #5 of 7
Thread Starter 
Great info from all of you, thank you! The manual is pretty useless and so is tech support. I don't quite understand PWM vs. voltage. I didn't think fan Xpert would work at all with 3 pin fans.

themedesign, are you sure Asus motherboards are capable of raising and lowering 3 pin fan speeds depending on load?

hawkeeyee, I realize they're only 1300 RPM fans, but they're still under that speed. The case fans aren't even close.
Quote:
Originally Posted by dklimitless;13926048 
I have noticed that in BIOS, my temp is ~40C but in OS, it drops to mid 30's which is fine by me.

That's good news. I hope this is the case! I'll report back tomorrow after I finish installing everything.

It's not that I need to control them, but it would be nice if I can. One thing I don't want is for the fans to be spinning too slowly. I'd rather have all 5 running at 1300 RPM all the time. The noise isn't an issue.
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post #6 of 7
Quote:
Originally Posted by Alex Zivojinovich;13925186 
When I first went into BIOS, the CPU temp was 38, then 39, and now it's mostly at 40. I've seen 41 max. MB temps are 31 max.

I just got my build together last night & like yours, my temps are higher in bios. But as soon as I come out they go down to 29 & 30. Its warmer in here tonight a/c off idleing around 31 -33 in windows & during some heavy use so far i have seen as high as 38 but they go right back down to 31- 33 again.
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post #7 of 7
As far i know i can control fan speed if you plug you fans into 3pin on the motherboard.

p8p67 has 5 fan connectors on the motherboard
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Haf x Zangetsu
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