Rebuilding my gaming computer

[Jack_arcomes]

So I built my first computer just about a year ago before RAM and GPU prices started to sky rocket. I am currently planing to convert my PC to a Mini-ITX form factor as I am going to UNI soon and my PC is a little to big for the desks that is provided with the accommodation so the smaller size will help. I plan on reusing most my parts CPU, GPU, RAM, PSU, and storage (more is going to be added when I am doing this) and the motherboard that I will be using is the ASUS Z270i gaming. I have three questions:

 

1) Currently my air cooler is a Cryorig R1 ultimite which is massive but it is two big to use on a ITX board, so I decided to look at AIO's and I have discovered the Cryorig A40 but are there any others that people would recommend to use and does the H100i v2 require USB 2.0 headers to operate? 

 

2) Are there any other good ITX cases that are user friendly that are recommended?

 

3) Can I just insert my current SSD boot drive into the new build and use the operating system on that SSD, do i have to reinstall windows on it?

 

Thanks 

[hconverse02]

1) don’t get either cooler, get this for itx- https://pcpartpicker.com/product/fhqbt6/noctua-cpu-cooler-nhl9x65

 

2) as for a case, according to here: https://techguided.com/best-mini-itx-cases/, the phanteks enthoo evolv is decent and has good reviews https://pcpartpicker.com/product/bpbkcf/phanteks-case-phes215pcbk

 

3) yes 

[Jack_arcomes]

Thanks been wondering about that boot drive stuff. How come no to either of the AIO's?