What to do is accept the fact that MS killed 7. Sorry. R.I.P. # 7. Not one computer I have own that did not have Windows 10 as the OS to start with had problems. Also a 2014 set up after July 2019 is going to feel really old. Intel and AMD have moved forward enough to where chips and boards work differently together from previous generations so the line for backward compatibility for chips and some components doesn't have more than 2 years of depth. But that mainly is regarding chips and motherboard components. Your power supply can be reused as well as your storage drives. Using the older drives may not take full advantage of the newer equipment but that concern should not drive your actions. I also wonder about your hardware if you were having previous problems with your power supply and what a failing supply may have done.
What I do not understand is the frustration with the sound card because the rest of your equipment doesn't seem to match to a sub $200 soundcard. I would recommend an external DAC but if you want to upgrade your processor, motherboard, and RAM first or audition and save for a new DAC, the newer boards have audiophiles covered. The complaints of older threads regarding USB, onboard processing, jitter, clocking, power stabilization etc. are being addressed by the PC industry. Here is an example of what is on this motherboard before you want to look at spending money on another soundcard.
It seems like with the RAID you have a full tower so the motherboard to get will be an ATX in size which is good for you because I am still waiting for some of the full size options drop to the smaller sizes so I can build a Windows10 media server/streamer for my setup with Thunderbolt 3.
What I do not understand is the frustration with the sound card because the rest of your equipment doesn't seem to match to a sub $200 soundcard. I would recommend an external DAC but if you want to upgrade your processor, motherboard, and RAM first or audition and save for a new DAC, the newer boards have audiophiles covered. The complaints of older threads regarding USB, onboard processing, jitter, clocking, power stabilization etc. are being addressed by the PC industry. Here is an example of what is on this motherboard before you want to look at spending money on another soundcard.
- 127dB SNR AMP-UP Audio with High-End ESS SABRE 9018K2M DAC, LME 49720 and OPA1622 OP-AMP, WIMA audio capacitors
It seems like with the RAID you have a full tower so the motherboard to get will be an ATX in size which is good for you because I am still waiting for some of the full size options drop to the smaller sizes so I can build a Windows10 media server/streamer for my setup with Thunderbolt 3.