pls help me! I got my son the bottom of the line R11 a few years ago. We just upgraded the GPU to a GeForce RTX 2060 which is causing it to over heat. We bought a new case thinking it would help with air flow but after switching noticed a few issues

1. the pre installed fans can’t be used with that mobo

2. It doesn’t power on now but when holding down the power button on the PSU the CPU fan spins

Can anyone advise as my son is quite upset his PC is not working.