So may I summarized it this way. If use ID Hunter for both GPU and CPU, I may void the warranty on the GPU unless I know how to put it back.
Or I keep the stock cooler of the GPU, then either I add in an AIO for the CPU, or a air cool type (Coolermaster/Noctua etc).
Then subject to case I choose, I then decide on the additional case fans.
And this is the point where I can get decide the fan size as well as color LED RGB fans I wanna spend on.
Well i rmb some GPU have stickers on the screw, once u screw out, warranty void already
Yes more or less just grab a cooler for CPU can already, else just stick with stock cooler for CPU.
Yup more of less for it.
As for fan hubs usually some case with fan controller will provide it as well, but mostly without fan controller, won't provide fan hubs, not really sure is it all high ends case, but I think only a few of them will be able to have it. Nonetheless u can still purchase one if u need, just need to find out which type u want to connect to, either mobo or fan controller.