So I was having a lot of problems with my old mobo, Asus Rampage VI Extreme, and instead of trying to RMA it I just bought the X299 Dark.  I installed it on Saturday and all was well, pretty amazing tbh.  But I have one niggle, and its my fans.  I have a EVGA 1080ti FTW3 Hybrid and I have 2 fans on the radiator in push/pull config, I then have them 2 fans going to a splitter and plugged in to the motherboard (SYS_FAN1).  The BIOS when set to MAX on that fan header reports the fans only doing 740 ish RPM's, but when I am gaming they ramp up to 1600 RPM's.  Now if they were always at max (either RPM) that would be fine, but they do the whole spin up and down all the time which is really annoying.
 
I have tried the original BIOS (1.07) the latest 1.14 and 1.09 and they all do the same thing.
 
I don't overclock my CPU the only setting I have changed in the BIOS worth noting is setting my memory to the XMP profile.
 
Specs:
 
EVGA X299 Dark
32GB of Teamgroup DDR4 4000 (4x8gb)
EVGA 1080ti FTW3 Hybrid Gaming
512gb Samsung 960 Pro NVMe
1TB Samsung 970 Pro NVMe
2TB Samsung 860 EVO SSD
Corsair HX1000i
 
Any suggestions on how to make them stop changing RPM's would be appreciated :)

Which fan headers did you use
 
One of the #3s at the top right or #4s at the bottom right?
 
Grab your test bench PCB and look at the one you used to identify exactly which header you used
 

On this regard where's the bast place to hook up the fans?
I got the 3 coming from my h150i to syst1, one 140 to syst2 (#3 pic above) and the 3 coming from the case in fan in #4.
I still need to link them all through a commander pro...should I use #3 or #4 to use temp as controller fro all 7 fans?

So either of the fan connectors would work?
 
Is a a fan/led hub...practically a fan splitter for fan and lights

As far as I am aware the board headers cannot be controlled outside of the BIOS

If you are using an commander pro box then the fans would need to be hooked up to it directly

As far as the board connectors go only CPU 1 / 2 (#3 in the picture) are temperature controlled. The rest are static speed. All fan headers can controll both 3 wire voltage controlled and 4 wire PWM fans, obviously not both on a splitter to a single header.

Most case fans are 3 wire and most fans for radiator are PWM. AIO radiator fans can be either, up to the manufacturer, as PWM fans cost more and the controller is more involved

There is a 1A limitation per fan header and a 4.5A limitation for the entire unit of commander.
 
They are all Corsair LL fan 120 x 6 and 140 x 1, so 4 pin PWD.
 
I was thinking of puttin all the 6 120 fans on the commander and hook them to CPU 1 and keep the 140 to CPU2
 
Each LL should have a 0.3A so below 2A max 7-13.2 V
 
Am I wrong to do this?

Yeah I am not really worried about that...the h150i fans are powered with sata cable and the 3 in fron with a sata splitter...I was wondering if the 3 pin that goeas to CPU1 and 2 would cause any troubles

Dirtehh what are you using for a CPU cooler?

Posting from my phone, hard to look up / confirm stuff and post. Those are 4 wire correct. I have Vardar fans as well but I do not know if there was a 3 wire version (as to why I was asking)

The 4th wire is the PWM wire, if the fan does not see a signal there it is supposed to go to 100%

Just trying to get confirmation that both fans are the exact same and your splitter is a 4 wire

yea they are both 4 wire Vardar fans, with a PWM (4 wire) splitter.  I have actually seen them (with my old motherboard and briefly with this one) running over 1400RPM (which is why I am looking for help).  It's when they run at full speed and then go back to 700rpm that's annoying me! :D
 
I have just plugged them in to the CPU2_FAN header, they are both still running at 700rpm, but I have gone in to the SMART settings and set all the different temp stages to make them run at 80%, but maybe I should run them at 100% seeing as they seem to only be running at 50% :s  or maybe I should plug them in to my cases fan hub seeing as that is powered my a SATA power connector :s
 
Edit: Oh forgot to answer the CPU fan cooler question, I am using a Corsair H150i Pro 

What is this hub? Link to the case or hub?

I guess for testing purposes are you able to plug them one at a time into one of the lower #4 ports with it at Max to see if it runs at Max speed. Perhaps one of the fans is messed up and messing with stuff

There is one at the back IO but it is under the IO cover

Yea, that's a really nice thing to include, I am shocked that no one else has done it before :)
 
So I looked, and although there does appear to be a header between the IO housing and the DIMM slots, its occupied by one of the PWM fans (or maybe both? might be daisy chained), so I ended up removing the PULL fan from the radiator, and routing the PUSH fan directly to the CPU2_FAN header.  The BIOS now says its running at 2200RPM \o/  So it was either due to them drawing to much power or the fan splitter was knackered...I am tempted to lean towards power draw, cos I had it plugged in to the HIGH AMP header on my Asus mobo, so maybe that's why they worked alright on that :s
 
I think one fan running at 2200rpm will be better than 2 at 700rpm and an annoying noise when they decided to switch speeds :)
 
Big thank you for all the help!!  

Nice post bcavnaugh
 
This is what I use with my 140mm Vardars - https://www.ekwb.com/shop/ek-cable-splitter-4-fan-pwm-extended
 
I run the 3 x 140mm fans that are on the 420mm radiator on CPU_1 with the above cable and the 2 x 120mm fans on the 240mm radiator of a regular 4 wire splitter on CPU_2 - https://www.ekwb.com/shop...plitter-2-fan-pwm-10cm
My EK Pump is off of the SYS_1 fan header at max and the case fans are on CHA_FAN at 80% I think (3 x 140, 3 x 120 (120's are actually on SYS_2) which are all 3 wire fans)
 
I run a full single loop with both the CPU and GPU on EK blocks, all my PWM fans are linked to CPU temperature. I have watched my GPU temps like a hawk to make sure there hasn't been an issue and luckily my GPU temps have been great. I just wish my CPU would run as cool as it
 
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Your fans on your H150i are still stock for that cooler and hooked into the pump correct?
This is from the PDF - https://www.corsair.com/c...tent/H150i_PRO_QSG.pdf

Page 5
• Connect pump power cable to an available SATA power plug (figure 1).
• Connect pump tach cable to the CPU_FAN header on your motherboard (figure 1).
• Connect each fan to the shrouded 4 pin connectors on the pump (figure 2).
 
Page 6
Using the included CORSAIR LINK USB cable, attach pump unit to a motherboard USB header.

 
What they are doing here is outputting a tach signal to the motherboard so it doesn't freak out if there is no CPU cooler. The fans and pump are drawing power from the SATA connector and the Corsair software is controlling pump(?) and fan speed via the USB cable, controller is built into the pump assembly. Hook the fan header from the pump to CPU_1 so that you can monitor fan signal there. I would not get too wrapped up in the bios reading of that fan - look in the Corsair software.
 
The issue with your GPU Fans not being controlled by the GPU temp is that they will not spin up in response to GPU temperature, you would need something like the Corsair Commander which might be able to be configured to control fans off of GPU temperature. Maybe someone can recommend a 3rd party controller to do this.
 
 

guys I've been trying to change bios switch from 1 to 2 to 3 but still have the same problem...my 3 H150i fans still spinning like crazy, and my VRAM fans too...I have all set up to SMART control and Bios 1.14, Aio connected to CPU1_FAN...what can I do to actually make them be "smart"  or controlling them manually?