Yeah, I've spec'd mostly for performance and the case is all about the looks. I just wanted something crazy to showcase everything in. :D
Mines actually very noisy largely due to the current fan and airflow setup, it's long been on my list of things to do sorting it out. I have 8 intake fans which blow into each others from either side of the case so cause a hell of a lot of wind noise. Been meaning to make ducts and baffle like things to help with the noise hopefully.
That's a nice thing about computers if the still do the thing you need them to do you can pretty much run them for decades.
I did look into making mine even quieter, but it can get expensive and complex. I tried a passive CPU cooler, but it just did not work, so I got one with a big fan instead. If I had a big GPU then I expect I'd need more fans or liquid cooling, but it mostly does what I want. The only time the old hardware is really an issue is when rendering video.