Thank you all for replying!

Reason why I want a rackmountable case is because I wanna put it into the server rack. It is easier than pile open air frames up. Also, it is safe.

I checked out videos about a mining rackmount case on YouTube. Some of cases are not good air flow. Power supply obstructs air to out. Part of them are stressed to power cables, its dangerous.

I will try to find more better cases on the Internet. Thank you all! I will be here regularly.