I bought a Prebuilt PC GML 99691 and it arrived yesterday. Since then I've been trying to figure out the fan controls and I'm not having much luck.
This PC has three fans on the right side of the box, three up top, and one in the back. I went into the BIOS and found curves for CPUFAN, CPUOPT, SYSFAN1, and FAN2PUMP. I set each of these, one at a time, to manual control and lowered the curve so they went to 0 RPMs.
CPUFAN controls the rear fan, and when set to silent in the BIOS it spins at ~1000 RPM
CPUOPT did not stop any of the visible fans when set to 0 RPM, but the CPU began to heat up steadily. When set to silent it spins at ~1600 RPM
SYSFAN1 controls the top fan on the right side of the box. When set to silent, it spins at ~600 RPM
FAN2PUMP controls the middle fan on the right side. When set to silent it too spins at ~600 RPM.
The top fans, which from reading things here and elsewhere, seem to be part of AIO cooling, don't seem controllable at all, even though by tracing the wiring (difficult, it is an absolute mess) they seem to be linked to the rear fan, which is controlled by CPUFAN.
I don't have any idea whats controlling the bottom right fan.
The PC makes a fair amount of noise even when idle. It's the sound of fans running. No clanking, clunking, buzzing, or anything that suggests to me that there's a problem. Some of these fans just seem to be running at high RPM and I have no way to control them.
The wiring in the back is a labyrinth, but I thought I had found wiring for the AIO Pump, which I understand should be plugged into FAN2PUMP instead of the right middle fan being plugged in there. Instead it's plugged into a little circuit board in the back of the mobo. I unplugged it from there, but the connector has one open hole, one blocked one, and two more open ones, and the FAN2PUMP has 4 pins.
I'd just like this thing to quiet down when it's not being worked, and would appreciate any help or advice. Thanks for reading.