LOUD-ass computer

[OneGrassRoot]

I have a LOUD computer. The fan sounds like an airplane. We've been investigating the possible cause of this for months - it's not hidden programs running, the inside has been vacuumed, nothing works. This computer happens to have a brand new hard drive installed.

What I've been told is that the layout of that housing isn't ideal. It's not a matter of getting a new fan, it's that the layout is such that cooling (not liquid) isn't possible.

SO, my question is can I use an older CPU housing and replace it with this new hard drive? It is old though, so I don't know about compatibility. (Actually I wouldn't be doing anything as I am not an IT person.)

I have these two computers. One hella old, the other loud AF.

I hate the idea of wasting a new hard drive by having to get a new computer altogether. If it were possible to replace an older computer, in which the hard drive is indeed failing, with the new hard drive -- and maybe even replace the fan or anything else that seems to be wearing down due to age and use -- that may be the most expedient, least wasteful approach, it seems.

Alternately, is it possible to buy just the housing -- newer housing -- in which to install a new hard drive? I don't even know if housing is the right word...lol.

Thanks in advance for suggestions!