Corsair H80i GT fan rpm not increasing with cpu load?

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kol12

kol12

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Jan 26, 2015
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Hi. I noticed after a playing a game and monitoring with HW Monitor that my max temps were quite high, 68 degrees highest core. What I also noticed was the cpu fan had only gone from 820 rpm idle to 999 rpm load. Would this explain my high cpu temps? What rpm should the H80i be running under load?

I also notice in Corsair link that the H80i Gt cooler pump and H80i cooler fan are blinking red and have no values. The corsair H80i GT cooler temp has a value but is also blinking red.

I thought I would also mention I'm getting good idle temps as far as I know. 20's mostly.
 
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Hello,

At full speed, the H80i GT fans should go at 2300-2500 rpm and the pump at 2000-2300 rpm. Try disabling the Power Saving features from BIOS, thus forcing the fans + pump to go at full speed.

Connect both fans directly to the motherboard, leave only the waterblock connected to the CPU fan header, see the pump/ fans speed in BIOS. If the fans + pump are running OK now, try to reinstall the Corsair LINK software. You can also try to use another fan header from the motherboard. Pay attention especially at the pump' speed; if the pump is running at low rpm, you should consider to RMA the cooler.
 
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Disable any CPU power saving features, to be more specific (SpeedStep, Low-power CPU states, etc.), for maintaining the CPU at maximum speed and consequently at higher temperatures. Of course, disable also Q-fan or others features which are keeping low the fan rotational speeds.

What motherboard/CPU do you have?
 
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I didn't Install my H80i GT but I've got a feeling the fans have been plugged into the CPU_OPT header. In the BIOS the CPU_FAN has N/A. Am I plugged into the right header? This computer is fairly new, when I first booted I got CPU fan error and was told to change to ignore CPU FAN.
 
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H80i GT has the following connections:
- a 3-pin cable (must be connected onto the CPU Fan Header or directly to the PSU by using a MOLEX-to-fan adapter, not provided; it is powering the pump and the fan regulator);
- a 4-pin cable (will power both the radiator fans);
- a mini-USB (connected onto an USB header and allowing to use the Corsair LINK software);
- two 4-pin cables, coming from the fans; you can connect them either to the 4-pin cable from the waterblock, either directly to the motherboard (better solution), using CPU_OPT and the closest CHA_FAN port (CHA_FAN1 for example, if the radiator is mounted at the back of the case, or CHA_FAN4, if the radiator is mounted on top).

Now, if the 3-pin cable is indeed connected to the CPU Fan header, you must activate the DC mode for the CPU Fan port (use QFan Control from BIOS and set FULL SPEED for the CPU FAN). If the speed is still N/A, the pump is broken and you must RMA the cooler.

Did the pump speed is also N/A in the Corsair LINK software? You can test the CPU FAN port by plugging one of the radator fans and see if the port is properly reading the rotational speed; there is a possibility that the port is broken.
 
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It says CPU FAN N/A in the BIOS. All my other fans seem to be set on DC mode but I have a problem with Q Fan in the BIOS, after I select a different profile there's no way to apply it, the apply button is constantly greyed out.. All my fan headers seem to have something connected to them but where they come from is a different story, I will have to have a closer look, could be difficult as the waterblock is covered by the radiator now. I'm not sure what's plugged into the CPU OPT header but in the BIOS it's running at about 800 rpm, my chassis fans are running about the same. I've read there's been some issue's with Corsair Link in Windows 8.1 not showing fan and pump speeds, do you know?
 
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There could be something wrong with the pump but it would be real a pain if it is because this is a replacement of a another H80i that had a faulty pump. I'm getting good idle temps (20s) so pump must be working?
 
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Your assumption could be right, based on such idle temps. Maybe the software is not ramping up the pump' speed accordingly.

I am not aware of any Win 8.1 issues; you could run the LINK software in Win 7 Compatibility Mode, see if it changes anything.
 
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I have checked the H80i GT box and the fans are rated for 2450 rpm. In prime 95 they are only spinning 1100 rpm, that's my assumption that they are the fans as CPU in HWMonitor, i mean what else would be a CPU fan in HWMonitor? I really don't know what's causing this or where to look, I would of thought with a prime 95 test those fans would be going as fast as they could..
 
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HWMonitor have no means to "know" what device is connected to the CPU fan header, so it is assuming it's a fan. Only Corsair LINK is aware that the device is a pump, and should modify its speed according to the CPU temperature. By not doing so, it means either the pump is broken (it is possible), either the software is not working properly (most likely), either the fan header is damaged (connect the 3-pin cable from the waterblock to the CPU_OPT and move one of the fans to the CPU-Fan). Also, update the motherboard's BIOS to the latest version (QFan should be operational no matter what).

Try not to force the system with the Prime 95 before solving the issues, you will put unnecessary thermal strain onto the CPU.
 
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Bios is at the latest version. I've discovered the fans on the H80i are plugged into the CPU FAN header because I pulled the plug and the fans stopped. I believe the waterblock has a cable from it with a splitter for both fans and then another cable from the block to the CPU FAN header and I'm guessing that cable sends the fan and pump speed information but I'ts not doing either (Corsair link not detecting) Something is really wrong here, its a matter of figuring out if it's hardware or software related. I don't believe the pump is not working at all because I'm still maintaining my idle temps in the high 20s. At this stage I'm not sure what is plugged into the CPU OPT header but it may be a case fan and nothing from the H80i.
 
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I have just reinstalled Corsair Link and my H80i GT pump is now showing but not the H80i GT fans. H80i GT Cooler temp has also stopped blinking red just fans nows, it's looking like a fan issue. Pump is set to performance mode idling at 1800 rpm, sound right?
 
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Wow that's Interesting started up Prime 95 with Corsair Link running and H80i GT fan decided to stop blinking red and show a rpm of only 600, as soon as I stopped Prime 95 it started blinking red again with no reading.
 
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Wow I'm starting to get somewhere. I opened Fan Xpert 3 in Ai Suite, set the fans to full speed, went back to Corsair Link and the H80i GT fans were showing again, I was then able to change through the different profiles, Balanced, Performance Mode etc and the fans sped right up, first time I have seen these fans speed up! Now the problem is when I set the Fan profile back to standard in Fan Xpert 3 all control of the H80i GT fans in Corsair Link is lost again. Hmm..
 
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Ok I think I've worked it out, all this time I think the CPU FAN had to be set to PWM in the Bios. The H80i is now constantly showing in Corsair Link. The only thing I am finding is the H80i fans were a lot quieter in DC mode, they seem to be idling at 900-1000 rpm in PWM mode compared to 800 rpm in DC mode and it's quite noticeable, was very used to the quiet until now. Hmm actually setting the H80i fans to quiet mode in Corsair Link drops the rpm back but is no quieter so maybe it's a chassis that has increased somewhere? Still doesn't explain why Q Fan in the bios is not functioning.
 
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So I put the fan speed control to manual and set the pwm slope to the max. I put the cpu mode to PWM. The cpu fan (or pump in this case) still seems to idle around 800 rpm. my temps are like 40-50 at idle. Is the pump broken?
 
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Hi burbee. I just re-installed Corsair Link and my pump was then showing but still no fan speed. I set the CPU FAN ton PWM mode in the bios and then my fans starting showing as well. I believe the cable from the waterblock to the CPU FAN header controls the pump and fan information although I have a H80i GT and am not sure if a H80i differs. Those idle temps don't sound good, your pump may be broken.
 
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