If the fans were racing you would see it go 700-100-700 etc. This also seems relevant since you are not seeing a speed change in Link. Again, you should have to put your ear pretty close to know it is running. At 700 rpm, you shouldn't hear any 120mm fan without putting your ear next to it. I guess the other thing you need to be careful of is whether or not the radiator fans are the real noise makers. Control the fans normally through the BIOS settings. Rules for the cooler still apply and it needs the Full Speed/Disabled setting to keep the pump going. They can go on CPU/OPT and then move the H100i v2 to a CHA header or AIO/W_PUMP header if your board has one. If for whatever reason you can't or don't want to use Link, take the fans off the H100i v2 pump block and connect them to your motherboard.

You need Link to see your coolant temperature and to then make an appropriate decision about how much fan speed you really need.

Put it up to 100% so you don't wreck the cooler, then use the Link software to turn the fans back down. When you don't disable the CPU fan (or set it to 100%/Full Speed/Maximum, etc.), you are reducing the voltage to the cooler. However correct me if I’m wrong but the way to ensure the cooler gets the 12V needed, I have to disable CPU Q-Fan control? When I do this my PC becomes very loud which I have not read anywhere that this happens to other people, any idea why?

Cpu q fan control