Is there something wrong with my system?

[undeath]

How did you select your hardware? Did you look at the price tag and pick whatever was most expensive? Nothing wrong with the hardware you selected per se but you could probably get away with half the costs by not selecting the most high-end components. Especially considering you were running a 12 year old rig until now and didn't seem to have a problem with its performance. Or do you have any specific requirements/use case?

What's your budget? Besides a case you are also missing a PSU. And you're planning to spend that much money without even a backup drive?