How often should you replace psu?

Hi there,

My computer is about 5 years old now and my friend told me that I should buy a new power supply, is he right? there has never been any problems with it so far?

The power supply is OCZ ModXStream Pro 600w Silent SLI Ready ATX2 Modular Power Supply

Also would I need to update my power supply if I bought a new graphics card? my current one is GTX 670 and I am thinking of upgrading to 1060

I didn’t find the right solution from the Internet.

References:

https://www.computerforum.com/threads/how-often-should-you-replace-psu.242307/

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