Replace noisy CPU fan - quick and easy way. Be quiet! fan.

An old work horse PC machine started making a constant loud noise. The source of the noise pollution was one of the three fans inside. There is a large case cooling fan, Power Supply fan, and CPU heatsink fan. The last fan was the culprit.

[@rysterstech]

with a dremel and zip ties, anything is compatible with anything.
If you are cutting metal, never do it with the components in the case, metal dust will cause short circuits and potentially a fire.