Asus Motherboard and Water Cooling RPMs

emiae

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Nov 20, 2013
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Hello!

I use an asus mobo Rampage IV Black Edition and water cooling on my cpu (cooler master seidon 120xl)

I have installed HWMonitor and AI Suite 3 that includes many tools including Fan Xpert. (Bought the motherboard 1 week ago)

At first my CPU fan seemed to go around 1350 RPM (mediocre sound) but after I did FAN Tuning from Fan Xpert it rolled down to 600-650 RPM (low sound). Although I can't complain about the reduction in sound, I would gladly get mediocre sound rather than low sound in order to have my CPU 3-5 degrees lower. Here's my porblem:

In 1350 RPM case on 3dmark11 benchmark test my CPU got around 60-61 degrees celsius from 32-35 degrees at idle and scored around 13279. On 650 RPM it got around 65-66 degrees celsius from 37-40 degrees and scored around 13250.

I know its not much difference but all I want to know is why did it turn from 1350 RPM to 650 ish RPM when I did FAN tuning (the sound also diminished so I presume the reading on HWMonitor was close to reality since I use it to track the RPMs).

The Fan Xpert tool still shows the CPU fan at 1350 RPM but the CPU OPT fan at 650 RPM whereas before Fan Tuning, Fan Xpert showed both at 1350RPM. Similiar for HWMonitor before fan tuning it showed 1350 RPM and after fan tuning on Fan Xpert it shows 650 RPM (that is why I am assuming HW Monitor tracks CPU OPT fan since it shows same values of CPU OPT fan from Fan Xpert)

Also when I do benchmark test and leave HWMonitor on to track maximum values of fan RPMs and temperatures, I see that the RPMs on CPU and Chassis 1 fan do not go up as the CPU temp goes up in BOTH CASES (before and after fan tuning from Fan Xpert tool). (chasis 1 fan is located infront of my case and connected to chassis 1 output on the motherboard, I have 1 fan on top of the case connected to Fan_OPT3 output on the motherboard and 1 fan on the side connected to PSU using 3 female to 2 male pin connector. (Case is HAF X from Cooler Master and PSU is Cooler Master Silent Pro 1000W 80+ Gold)

On BIOS its a complete other thing because it always shows both CPU and CPU OPT fan at 1350 RPMs although there always is more sound from the fans on windows than there is on BIOS.


(~1350 rpm changes around 1342 and 1378 rpm | ~650 rpm changes around 645-657 rpm)


Can you fill me in this subject? I can elaborate if you wish to get more explanation on my issue.


Thank you for your time!
 
Solution
Temps look fine. CPU fan speed look about the same as for my air cooler.

Different water cooling All In One (AIO) systems seem to work differently. The h100i uses the cpu fan header to control the pump speed which makes sense. I'm not sure about others.You need to read their instructions.

emiae

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Nov 20, 2013
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The problem is I just pressed fan tuning which should only check and report the systematics and/or attributes of each fan as it says. I haven't set any profile or anything and I most certainly can not find how to revert it unless I uninstall the software. And when I uninstall it the chassis fan goes to 450ish RPM on auto and both CPU, CPU OPT and Chassis 1 fan still do not go up when the CPU gets warmer (despite AUTO being selected in BIOS). This is my first water cooler on CPU setup so I dont know what RPM it should report or how it should work since there is 2 fans and a radiator in the middle of them on the back end of the case and a water cooling component attached on top of the CPU. The component being attached to CPU_FAN and the 2 fans attached to CPU_OPT.

Briefly, apart from pressing the Fan tuning, I have not made a single change from BIOS and AI Suite 3 Fan Xpert and in both cases 1350 or 650 RPM does not matter the RPM never changes even when the CPU is 35 degrees or 61 degrees.
 

emiae

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Nov 20, 2013
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But cant i somehow make them automatically arrange it? Doesnt the auto feature in bios set it to automatically scale the rpm to the temperature of the cpu? Also i do not know the working feature of water cooling so i wouldnt know how to or what to adjust the cpu and cpu opt fans on that matter. I have tried to check the net but until now all I could find were how to install tutorials only.

I mean since the water cooling on top of cpu has no fan what does the rpm for that unit correspond to? I dont even know that.

I thought setting to auto would suffice in bios since it did for my previous gigabyte x79-ud3 motherboard.

Also what is a good idle and benchmarked temperature for i7 4930k cpu?
 
If the default (auto) profile isn't to your liking, then you can customise it. This should affect either water or air cooling. Water cooling fans sometimes though are controlled by a case fan header and only the pump is controlled by the cpu fan header. You need to check how yours is set up.

For the 4930k, Google and read as much as you can; eg http://www.overclock.net/t/1426258/overclocking-i7-4930k-help/20
 

emiae

Honorable
Nov 20, 2013
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I have updated the BIOS and used your advice but rather than making a manual curve I've selected the "TURBO" predefined from BIOS removing all AI Suite 3 from PC using both REVO and a Cleaner tool added in the Asus forums. Now my chassis 1 and CPU(or cpu opt i'm not sure which one since HWMonitor says CPU Fan but Fan Xpress showed the same RPM as CPU_OPT Fan) adjusts themselves according to the CPU temp.

However can you please inform me how does the RPM thing with water cooling work? Does the unit attached on top of the CPU (plugged into the CPU_Fan socket) have a fan inside because it shows RPM or is it the RPM of the water flow?

I have checked alot from Google about 4930k and never found stock clock regular temps for a regular system. (I've used regular here but I meant an average or a common system.)

Here are my temps can you comment on it please I would really appreciate it as I appreciate your interest in my matter alot!

http://i.imgur.com/Wq1o2Vq.png

Thank you!

Also please feel free to comment about the RPM of the CPU fan if you know about Cooler Master Seidon 120XL!

Thank you very much!
 
Temps look fine. CPU fan speed look about the same as for my air cooler.

Different water cooling All In One (AIO) systems seem to work differently. The h100i uses the cpu fan header to control the pump speed which makes sense. I'm not sure about others.You need to read their instructions.
 
Solution