Re-use OptiPlex 9020 Case & Components?

Hi,

I bought a secondhand OptiPlex 9020 with the intention of upgrading the PSU & graphics card to use it to run golf simulator software. As expected, the PSU isn't powerful enough to run my new GPU, but I've just discovered that I can't just upgrade it due to proprietary motherboard connections...

So, my question is, can I re-use the case, replacing the motherboard & PSU, but re-using the other components?

Obviously, I can buy a replacement case too if required, but given I'm already spending much more than I'd intended, I'd rather keep the costs down where I can!

Thanks!