I like OpenRBG too. Version 0.9.
Works fine for the Led Strips connected to my Mobo : Asus Z690 Prime-A.
Works with the Front Led on my Gigabyte 4090 but not the the fans.
I'm unable to control LEDs on my Corsair Vengeance DDR5 no matter what I try. Gave Up. Enough lights anyway.
From what I read each 2x6 Pci cable directly coming from the PSU is good for 150 watts so the minimum would be 3 x 2x6 for 450 watts. This is what i did since November without issue. I did not increase power over 450 with MSI afterburner or a bios swap.
You might want to check out Argus Monitor. i use it to control all my case fans according to CPU AND GPU temps. It Has fan control for some AIO too.
https://www.argusmonitor.com/?language=en
Got this works great:
Fasgear PCI-e Gen 5.0 Power Cable - 70cm 12VHPWR 16-pin (12+4 pin) Male to PCIE 3x8pin(6+2 pin) Male Sleeved Cable - 600W GPU Power Cord for RTX 3090 Ti & RTX 4080 4090 Graphics Card | Modular PSU https://a.co/d/9HV7SDm