Will my case take a regular size psu ?

^ it's an option but a fairly untidy looking one really.

I agree though generally tfx psu's are godawful quality.

Apart from a couple,of,delta made units & the seasonics ((which are expensive) they are all,pretty much generic low quality rubbish.
 

CaptainCretin

Respectable
Jul 18, 2016
625
0
2,160
Your only other real option is to try and transplant the innards into a standard case; however DELL do have a habit of using rivets in their USFF and SFF cases, where everyone would use a screw; so you might need to drill out a few fixings to get the gizzards out.