OmriJ

I understand what you mean. Thank you very much for the help and have a good day

I'm no expert on voltage and amps, but I'd be cautious with splitting the CPU fan header. There may be a sticker on the fan, though, that may tell how much current it draws. It may be safer to contact Asus and inquire if the CPU fan header can support multiple fans. I think you're right, however, the fans should generally be the same power-wise. CPU Fans are generally designed to be more 'forceful' (static pressure) to push air through a heat sink, but that's just fan blade design.
 
Note, that when using a splitter, you can only control the individual speeds of all the fans as a group. All the other fans will run at the speed/amperage of the primary fan. The splitter I have has one connector with 4 pins, the rest only have 3 (but still support 4-pin fans). You can see what I'm talking about in one of the Newegg images. Splitting a CPU fan header may cause the other fans to behave oddly depending on CPU temperature.

I have two of these - https://www.newegg.com/Product/Product.aspx?Item=N82E16812423163 - Each has three NZXT 140mm fans.
 
I've read somewhere not to exceed 1.0A per header, but perhaps the newer or better quality boards may be able to handle more. Those NZXT Fans use 0.14 A (0.30 A max.), so three of them max would be 0.9.
 

You can use splitters on the motherboard header but note the amperage you will be drawing with the fans since you don't want to exceed the header's max rating. A good rule of thumb is 3-4 fans per header depending on the fan of course. 
 
You can run 3 pin fans on a 4 pin header just note that your header if it is setup as 4 pin PWM control will only run the fans at full speed. 

Dust Bunny`s  

It will absolutely work.

Should work out just great.  

Not sure but the Alpine will perform a lot better after you blow the dust out of it.

Yes, it should.

absolutely

I have a 1050 Ti with a i5 3470 running right now. It will do fine.

your graphics card will run at 8x, you should see no difference in performance

It truly doesn't because how massive pcie bandwidth is, even a Titan Xp won't bottleneck at 8x on pcie 3.0

3rd gen Ivy only has PCIe 2
 
To not limit graphics card performance. This wouldnt happen unless you use a powerful card though which I dont think you will use, so it's not necessary.

Regardless, at 8X you still won't see performance drops

As we say on Tom's... Glad to help, happy posting!