r/CYBERPOWERPC

I made the mistake of buying a PC directly from CyberpowerPC's website. I learned the hard way that they restrict UPS from allowing any delivery time changes or pickup, and absolutely refuse to make any exceptions. They expect you sit quietly at home during regular work hours to receive their precious product. This is, in the customer service rep's own words, "to protect us from liability", and they couldn't care less what happens at the customer's end. If you try to complain to them, they will reply condescendingly that you "signed an agreement" when you made the purchase and they won't do anything to help you. When I argued that I didn't sign any agreement about restricting delivery options, guy just said, "well, we didn't say it wouldn't be restricted". This is unbelievable behavior from a customer service rep. Don't make the same mistake I did, don't buy from them direct.

I have a CyberPowerPC prebuilt with a Gigabyte B850 GAMING WIFI6 motherboard. The case fans and AIO/pump RGB all work normally and can be controlled together using the physical LED button on the case.
I’m trying to get the lighting controlled by the motherboard through Gigabyte Control Center / RGB Fusion, but nothing I do in GCC changes the case lighting.
What I’ve checked:
There is definitely a cable plugged into the motherboard’s ARGB_V2_2 5V ARGB header.
The RGB/fan setup also has SATA power.
Short-pressing the case LED button cycles the colors/effects normally.
Holding the LED button causes the lights to flash white / flash twice, which I believe is supposed to switch the controller into motherboard-sync mode.
After doing that, changing colors or selecting Off in RGB Fusion does nothing.
I turned Sync off in GCC and tested the individual ARGB zones. None affected the case lights.
I also tried GCC’s ARGB Calibration on ARGB_V2_2. The case lights stayed their existing color instead of displaying one of the calibration colors.
GCC correctly detects the B850 GAMING WIFI6 and shows its RGB/ARGB controls.
The Gigabyte RGB components appear installed, and the gdrv3 and MyPortIO drivers are running.
GCC is actually saving the RGB settings I select in its profile, so the UI appears to be working.
The fans themselves also run through a hub. GCC can control their PWM percentage, although it reports 0 RPM, presumably because the hub isn’t passing a tach signal back.
My main question: Does anyone know how CyberPower wires the RGB hub/controller in these systems? Is it possible that the cable on ARGB_V2_2 is connected to something other than the hub’s motherboard-sync input, or that another sync/data cable is supposed to be connected at the hub?
I’d especially like to know if anyone with a similar CyberPowerPC/Gigabyte setup can control the stock case RGB through GCC/RGB Fusion, and what their wiring looks like.
I’d prefer not to start unplugging cables until I know what I’m looking for.