Chassis/Case fan not recognized by BIOS, Speccy and SpeedFan but still working at minimal RPM

Jun 27, 2018
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I bought a GPlay Samurai PC recently and several things caught my eye.

1. Since I was dumb enough to enable the "Chassis Intrude" protection it kept giving me that error and locking me out of BIOS. I had to open the case and remove the CMOS battery.

2. When I first started the computer the Chassis fan on the rear panel wasn't working, but still lit by the bright blue LEDs.

3. When I opened the case my front panel USBs weren't connected to the motherboard, so I connected them. However, their cable was stuck in the aforementioned fan's blades, possibly blocking its spinning.

4. The fan is connected via a small cable to a 4-pin cable coming from my SSD, and I can't find a free spot to connect it to the motherboard (the fan still works, mind you).

Now, to the real question.
On my older system my CPU fan worked at 950-1000 RPM regardless of temperatures. I didn't know that until recently, because it used to be controlled by the BIOS and wouldn't respond to SpeedFan's manual control. Then I installed Speccy and it showed the same 950ish RPM at SEVENTY DEGREES CELSIUS! I went into the BIOS, disabled "Smart Fan" and the CPU began spinning at 4500 RPM immediately. Now SpeedFan controls it.

Kn4Bi6K.png


(Ignore the clock generator by the way. I never intended to overclock my CPU; set it out of curiosity but it isn't active [no ACER motherboards are in the list anyway])

How does that tie to my new system?
SpeedFan shows a bunch of Aux/GPU fans with 0 RPM, which don't exist. I was like "Sure, it's a 6-year-old PC, the motherboard must be pretty outdated". But when I installed Speccy and SpeedFan on my new PC they also show non-existent Aux Fans at 0 RPM, don't detect my GPU Fan (as if I don't have one) or the Chassis Fan.

My CPU Fan is being controlled by the BIOS, the GPU Fan - by GPU TweakII (came with the drivers), but my Chassis Fan is not being controlled by anything and I'm missing on at least 33% extra cooling if ever needed, right? So, how can I make my motherboard (BIOS) or any software detect and control that fan, if possible?
 
Non existing fans showing 0 rpm is normal because there's nothing turning. GPU fan would be controlled by GPU and as some are just with 2 wires it has no way of reporting rpms. That chassis fan may be controlled by BIOS.
 


It isn't because even the BIOS doesn't detect it.
 


Only 1 wire, connected to a 4-pin connector coming from the SSD.
 


Well, yeah, it has only the two wires that give it power. But they do come from the unconnected SSD cable.
 


It's totally quiet. Unless it can't turn at more than silent speed...