For anybody not doing generative AI with it and not running massive loads on it, if you’re going to use an old gaming PC as a home server, at least replace the graphics card with a cheap one with no fans or use the integrated graphics on your CPU (something I believe pretty much all consumer CPUs of the last two decades have) and underclock the CPU if you don’t need full processing power since even small reductions in clock speed can significantly reduce the maximum temperature.