Does it make sense to replace the power supply?

Question

Iron

Configuration:

• Intel Xeon E3-1280, DeepCool Gammax 200T active cooling
  
• Nvidia GTX 1060 3Gb
  
• SSD 240 GB
  
• HDD 320 GB
  

Now the power supply is set to 450W. The power supply is not new, without certification, worked for about 4 years.
Actually the question is - at the start the fan began to spin up very loudly, but after a restart or if you shake it a little, the noise disappears. Does it make sense to replace the PSU or can something be done with what is? And if you take it as a replacement, then what power should you focus on and what solutions will be the least noisy?

Answer 1

if you are sure that the noise is from the PSU fan, then just either lubricate it or replace it. Usually they use regular 120mm coolers.

Answer 2

Clean from dust, check if the capacitors are swollen, lubricate the cooler.
If the Chinese non-name - its replacement will not be a stupid idea.