Ok. Start with How many cables are on those fans. If true RGB, they'll have 2 wires. One for the RGB lighting, and one for the fan. If just one 3pin cable, those are fake RGB, they are just LED fans with multiple colors you cannot change.
The difference is important because it determines several things.
For a Fan, 3pin and 4pin use the same header. 3pin is analog, controlled by voltage, so you get a range of usually 40% to 100% fan speeds. 4pin is digital, controlled by a signal, and always stays at 12v, the signal changes the speed. But the motherboard header is the same (12v/gnd/tach/signal). A 3 pin only has use of the first 3.
But that's just the fans. If it's fake RGB/LED type fans, they use the same voltage as the fan, just the 1 cable, so as voltage decreases, and the fans slow down, so does the brightness.
RGB and ARGB (addressable RGB) do NOT use the same lighting header. RGB is analog and uses 3 ground wires to change the resistance inside the circuit for each color. ARGB is digital, uses 5v instead of the fans 12v, and uses a JRainbow 4pin header, (5v constant/GND/blank/signal). They look somewhat alike on the motherboard, but are most definitely not the same. Trying to force 12v RGB through a 5v ARGB fan has consequences.
So a 3pin/4pin Fan connector is the same thing, an RGB/ARGB Lighting connector is Not.
As is, I'm pretty sure the A320 does not have RGB/ARGB headers, so the only thing that'll work is Fan headers and the fake RGB/LED single wire fans. They will dim as fan speeds slow down.