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Issue with Fan Xpert 2 and liquid cooling system

MrSeven
Level 7
Hello guys, im new to this forum and hope i post in the right corner.

Im sure some of you tech pros might help me with the following issue as i found no solution on the net:

The situation: installed a liquid cooler for my CPU (Corsair H110) and connectedthe two fans which cool the radiator to OPT 2 and 3 (3pin) on my maximus v extreme mainboard. The circulation pump got connected to "CPU FAN".

Fan Xpert2 recognizes all three devices, also that the pump is a "fan" which it can not tune down. However, looking upon the two radiator fans its telling me to connect the thermal sensor with the OPT TEMP Header on my mainboard and therefore not able to read the temperature (all other chassis fans run perfect and the AI Suite Sensor recognizes CPU, Maiboard and PLX Temperature)
Even if i knew what sensor it is rambling about i would not want to use at as i want those two fans (like all others) being influenced by the CPU temperature.
Is there a way to assign what sensor is used for what fan? or has someone another solution for my problem?

Please excuse my poor english but i hope you understand what the my problem is.

Best regards!

J
Asus Maximus V Extreme
Intel i7 3770K 3.50/3.90GHz Unlock
Corsair H110
16GB (2x8GB) Geil Evo Veloce DDR3 2133MHz
Gainward GTX 670 Phantom 2GB
Corsair Force GT 120GB SSD
Seagate Barracuda 2TB
ASUS DRW
Coolermaster Silent Pro M2 720W
Corsair Vengeance C70
19,906 Views
10 REPLIES 10

nikosa43
Level 12
MrSeven wrote:
Hello guys, im new to this forum and hope i post in the right corner.

Im sure some of you tech pros might help me with the following issue as i found no solution on the net:

The situation: installed a liquid cooler for my CPU (Corsair H110) and connectedthe two fans which cool the radiator to OPT 2 and 3 (3pin) on my maximus v extreme mainboard. The circulation pump got connected to "CPU FAN".

Fan Xpert2 recognizes all three devices, also that the pump is a "fan" which it can not tune down. However, looking upon the two radiator fans its telling me to connect the thermal sensor with the OPT TEMP Header on my mainboard and therefore not able to read the temperature (all other chassis fans run perfect and the AI Suite Sensor recognizes CPU, Maiboard and PLX Temperature)
Even if i knew what sensor it is rambling about i would not want to use at as i want those two fans (like all others) being influenced by the CPU temperature.
Is there a way to assign what sensor is used for what fan? or has someone another solution for my problem?

Please excuse my poor english but i hope you understand what the my problem is.

Best regards!

J


Hi MrSeven, welcome to ASUS ROG. Solution is very simple. All you need is a Y-4pin adaptor for your fans and a molex to 3pin header adaptor. Your pump has a 3 pin connector. This one needs to run full speed all the time, to recirculate the liquid. There is no benefit to have it connected to the CPU header, because CPU and CPU_OPT headers are the only ones on the mainboard that cannot control 3 pin fans. These ones need PWM 4pins fans. All the other fan headers on the board can control both type fans (3pin and 4pin PWM). So use a molex to 3pin adaptor to connect your pump there and feed it straight from your power supply. Get a 4pin Y split connector and connect your two PWM fans one the double side and the single one connect it to the CPU header. Now you have both your identical PWM fans controlled from the same header and through Fan expert, you can assign profiles or custom made profiles to suit your needs.(Both fans will rev to the same rpm). You can also try to connect each fan to the CPU and CPU_OPT header without the Y connector. It may work. It's just, that sometimes, 2 PWM signals may confuse the board circuit and cause issues. I think I gave you an idea, now it's your turn to practice. Go for it.

Thanks alot, this gave me some insight and stuff i might want to try out.

I think the pump itself does good, its allways running at the intended max. speed but i will connect it to the main supply.

I will also get myself the two 4-pin adaptors (might not those itself solve the prolem?) but i dont want to put them on the same header as i want them to run at different speeds. On idle one fan running at 600rpm and the other one at 0 is totaly enough to get the CPU to arround 30C so, for noise reason i would like to keep it like that and only want the 2nd fan to start (and the 1st to tune up) as the temp raises to 40C. I dont remember what happend but connecting to CPU OPT caused some issues, thats what i tried in the beginning
Asus Maximus V Extreme
Intel i7 3770K 3.50/3.90GHz Unlock
Corsair H110
16GB (2x8GB) Geil Evo Veloce DDR3 2133MHz
Gainward GTX 670 Phantom 2GB
Corsair Force GT 120GB SSD
Seagate Barracuda 2TB
ASUS DRW
Coolermaster Silent Pro M2 720W
Corsair Vengeance C70

I just realized that you said the CPU and CPU OPT are the only two that can NOT controll 3pin fans, but the fans that come with the H110 are actualy 3pin fans. That would also explain why it did not work out on the first run when i connected them there
Asus Maximus V Extreme
Intel i7 3770K 3.50/3.90GHz Unlock
Corsair H110
16GB (2x8GB) Geil Evo Veloce DDR3 2133MHz
Gainward GTX 670 Phantom 2GB
Corsair Force GT 120GB SSD
Seagate Barracuda 2TB
ASUS DRW
Coolermaster Silent Pro M2 720W
Corsair Vengeance C70

nikosa43
Level 12
In that case you have to play around with the rest of the mainboard's headers, or replace the two fans with two new PWM capable ones. If you care alot about noise, I suggest Noctua. They have top quality, efficiency and practically silent.

MrSeven
Level 7
Thanks again for your answer. Replacing the fans was also my first thought but it was such a hassle to install them. At least i could then add two dustsfilters which i was later thinking about.

Yes, silence is my main criteria as i use my computer 50% of the time low load and i hate nothing more than loud fans. That was the reason in wanted to tune them down in Fan Xpert or why i use it in general. Currently only one intake runs at 600rpm and one of the radiator fans run at 600rpm. Together with the Phantom you can barely hear my system and temperature does fine. Anyway i have some last questions then i should be fine.

-what do you think is causing the sensor issue in general? Should it not "use" the cpu sensor thats on the mainboard like all other fans do (in fan xpert).

-if you would want to buy the most silent fan, regardless its capacity, what would you go for? i browsed the net a bit but of course every manufacturer claims to be the most silent.

-what tool (it can also be hardware based) would you reccomend to get full controll over all your fans? The only criteria is that it should be useable by a noob like me (even if i was able to assemble my pc all alone)

Thanks alot for your help!
Asus Maximus V Extreme
Intel i7 3770K 3.50/3.90GHz Unlock
Corsair H110
16GB (2x8GB) Geil Evo Veloce DDR3 2133MHz
Gainward GTX 670 Phantom 2GB
Corsair Force GT 120GB SSD
Seagate Barracuda 2TB
ASUS DRW
Coolermaster Silent Pro M2 720W
Corsair Vengeance C70

Zka17
Level 16
Getting the most silent fans is a little bit tricky... the thing greatly depends on what are you using the fans for...

When it's about to get a silent case fan, then it's relatively easy... but when you're going for radiator fans, things are getting complicated... If the radiator has high fin density (the H110 is pretty dense), then you need fans which has higher static pressure to push the air through those fins... - now the problem is that high static pressure = noise... So, you have to find your optimal noise/efficiency ratio...

All quiet fans (Noctuas, Cougars, Gentle Typhoons) have lower static pressure than the stock Corsair fans... one thing you can do, and a lot of people are doing it, to use push-pull configuration... - then the airflow is better and you may not need to run those fans at their max settings...

nikosa43
Level 12
Zka17, gave a an excellent answer about the fans question. With push-pull configurations seems to have the most efficient results, combining low noise and low temps. In addition, from my experience, anything that goes over 1500 rpm is noisy and sometimes is much more complicated to choose, because the same fan, to the same rpm can produce different noise levels, if you use it as a case fan or as a radiator fan. Another thing I wanted to ask is the following. I have checked the specifications of H110 and realized that they come with 2 x140mm PWM 4 pins fans. Why your kit has 3 pin fans? As to your other questions, Fan expert adjust the rpms of the fan based on CPU temps. You can also create your own different profiles, or use manually static setups. The important thing is to leave it first make an Autotuning, to search and create an rpm profile for every fan on your system. The optional temp sensors are for additional readings to the places you choose to stick them. ASUS provide the headers for them, but it is your choice where you stick them and get readings from them. You can buy them from ASUS e-shop, but also others from Amazon are compatible. Personally I have 3 of them connected to VRMs mostly and I had them from an old Scythe fan header controller.

nikosa43
Level 12
Oops, I forgot your last question. In my opinion there is no better tool in the market to have total control of your fans than Fan expert. Of course there are drawbacks, as in every solution. (Maybe others disagree to my opinion 🙂 ). It's a bit heavy, uses lots of resources, you cannot set limits under 600 rpms, but if you are not a heavy overclocker you should not face any problem. With hardware solutions, you cannot have automatic control, only manual, unless you pay money that usually pay for a motherboard.

@Zka17 i was planning to look for fans that reach high static preasure at low rpm

@nikosa even when im gaming etc. the temp stays bellow 40C with just one stock fan running at 40%. thats why i wanted to use fan xpert in the beginning to tune them down. where did you find the information about the number of pins? i couldnt find any on the corsair site and the manual shows both type of pins not stating clearly what should be there.

You say its adjusting the fans according to the CPU temp, but thats what its actualy not doing on OPT 2 and 3 in my case as it is demanding a temp probe.

I did the whole autotuning, also i was using fan xpert before the H110 and was amazed by it but im sure im gonna get it to work the way i want
Asus Maximus V Extreme
Intel i7 3770K 3.50/3.90GHz Unlock
Corsair H110
16GB (2x8GB) Geil Evo Veloce DDR3 2133MHz
Gainward GTX 670 Phantom 2GB
Corsair Force GT 120GB SSD
Seagate Barracuda 2TB
ASUS DRW
Coolermaster Silent Pro M2 720W
Corsair Vengeance C70