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Fatal1ty X99X Killer Motherboard Sensors
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DJViking View Drop Down
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Points: 70 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DJViking Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2016 at 10:47pm
Originally posted by parsec parsec wrote:

You are definitely seeing the Fractal's pump speed if it is connected to the CPU_FAN2 header.

I can see in your large picture that two of the fan connectors on the 3 into 1 fan cable, which is a four pin PWM fan splitter cable, have only three wires connected to the fan connector.

The fan connector on the left side has four wires going into it, while the two on the right have three wires. I'm pretty sure that the two fan connectors on the right only have three connecting pins, while the one on the left has four pins. That is the correct design for a PWM fan splitter cable. The speed/RPM signal wire is only included on one of the fan connectors.

The usual usage of this fan cable is with two or three identical fans, which should all operate at the same speed. So monitoring the speed of one of the fans is all that is needed, as well as possible. Of course we cannot know if one of the fans whose speed cannot be monitored with this cable is not running, or running at the same speed as the others. That is simply the limitation of the way fans and the fan connectors on all mother boards work.

A fan splitter cable made for three pin fans will only have three connections to one of the fans, all the others will only have two connections, one for power and one for ground.

If the pump on your Fractal CPU cooler is meant to be running at full speed all the time, you should connect it to the three pin Power Fan Connector on your board. The Power Fan Connector will provide full voltage to the pump at all times, which is the purpose of this fan connector.
The pump is now running at 2122RPM, while max is 2400RPM
The fan(s) is now running at 1443. while max is 1700RPM
Neither is running at full power, but I thought that CPU_FAN2 did not have any control and would run on full power.


Well that clears that. Then I know that fan2 is "CPU Fan" while fan6 is "CPU Pump".

Then that leaves fan1, fan3, fan4, fan5
There are 1 power fan and 3 chassis fans not currently in use. I could connect one fan to each and try to identify which is which, but that is a lot of work than I am not sure I want to do.


Edited by DJViking - 09 Aug 2016 at 11:18pm
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Originally posted by DJViking DJViking wrote:



So I guess then that the value showing for CPU FAN number 2 is actual the radiator pump.

Yes. CPUFAN1 is the three 120s grouped/reporting as one, and CPUFAN2 is the pump.

And an FYI/PSA concerning each of Fractals AiO Water Cooling Kits, direct from Fractal:
Quote
Max. Thermal Cooling Performance for operation at full speed:
 ??T12 ??CPU TDP 250Watt and GPU total 150 Watt
 ??S24 ??CPU TDP 250Watt and GPU total 300 Watt
 ??S36 ??CPU TDP 250Watt and GPU total 600 Watt



Nice AiO by the way.
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DJViking View Drop Down
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Got it working with this custom config /etc/sensors.d/nct6791.conf
chip "nct6791-*"

   label in0 "Vcore Voltage"

   label in2 "AVCC Voltage"
   set in2_min  3.3 * 0.90
   set in2_max  3.3 * 1.10

   label in3 "+3.3V Voltage"
   set in3_min  3.3 * 0.90
   set in3_max  3.3 * 1.10

   label in7 "3VSB Voltage"
   set in7_min  3.3 * 0.90
   set in7_max  3.3 * 1.10

   label in8 "Vbat Voltage"
   set in8_min  3.0 * 0.90
   set in8_max  3.3 * 1.10

   label fan1 "Chassis Fan 1 Speed"
   label fan2 "CPU Fan Speed"
   label fan3 "Chassis Fan 3 Speed"
   label fan4 "Chassis Fan 4 Speed"
   label fan5 "Power Fan Speed"
   label fan6 "CPU Pump Speed"     
    
   label temp1 "MB Temperature"
   label temp2 "CPU Temperature"

What remains now is to determine what the rests are.
in1, in4, in5, in6, in9-14
AUXTIN0-4
PECI Agent 0


Edited by DJViking - 10 Aug 2016 at 3:40am
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Points: 4996 		Post Options Post Options   Thanks (0) Thanks(0)   Quote parsec Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2016 at 9:25am
Originally posted by DJViking DJViking wrote:

I think I had it reversed.
The CPU radiator pump had a 4pin power cable. That one I plugged into CPU_FAN1. The 3 radiator fans 3pin where attached to the CPU_FAN2.

Edit: False alarm
The pump is powered from a braided 3-Pin fan header cable


I checked the specs for your Fractal Kelvin S36:

http://www.fractal-design.com/home/product/water-cooling/s36

The three fans are four pin PWM controlled fans, and the 3 into 1 fan cable makes perfect sense with those fans. This cable should be connected to the board's PWM controlled CPU_FAN1 header, with the three fans connected to this cable. They will all have their speed controlled by the mother board's fan control, which can be configured in the UEFI.

The pumps for this type of CPU cooler normally should run at full speed all the time. The manual does say that, but they also say that about the fans, which is usually not a good idea because of fan noise.

If you configure the fans to change their speed with the CPU temperature, if you connect the pump to the CPU_FAN2 connector, it will not run at full speed all the time. You can decide about the pump running at full speed or not. If you want the pump at full speed constantly, connect it to the Power Fan connector, which cannot be controlled by the mother board, by design. That connector is meant to be used with a fan or pump that should be run at full speed all the time.

You could connect the pump to one of the Chassis fan connectors, and configure it in the UEFI to run at several different speeds, depending upon the CPU temperature. That will be independent of the radiator fan speeds. You could configure the pump to run at say two speeds, low at CPU idle conditions, or full speed when the CPU is hotter than say 40C. You can experiment with the pump speed, using the CPU temperature you get as the deciding factor about running it at full speed all the time or not.
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The pump works fine in the CPU_FAN2 connector. It is currently not running at full speed, but aprox 85%. At Idle the CPU temperature is 28 degrees Celsius. It might increase to full speed if the CPU load is more intensive (TBD).
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