Question My 6 years old Silencer MK II 750W PSU is making rattling noises, should i replace it

[Chickenator]

Hi! My Silencer Mk II 750W PSU from PC Power & Cooling has recently started rattling. It's coming towards it's 6 year anniversary in a couple of months and so i have two questions i hope i could get some help with. First one and most important being: is it time to replace it?
Secondly, is this generally a bad PSU for overclocking? I've tried a fair bit on my old i7 4770K but it never seemed to be stable enough. Could the PSU be the reason?

The rest of the build is as follows:
CPU - Intel i7 4770K
Cooler - Noctua NH-U14S
MB - Asus ROG VI Hero
Graphics card - GTX 1070
RAM - Corsair Vengeance 2x4GB
SSD - Samsung 840 EVO 500GB
Realizing how old this build is makes me want to upgrade hah!

Thanks in advance

 

[FALC0N]

I'm going to assume the ratting is the fan. Is that consistent with what you are hearing?

 

[Chickenator]

Yeah the rattling is coming from the fan. Sorry, i forgot to mention that.

 

[FALC0N]

i guess you could try replacing the fan, but that can be very dangerous due to the electrical that the caps can hold. I think it does have a 7 year warranty, assuming anyone is left to honor it.