It is still a good PSU but they age. The better the quality the less likely to take other parts with them. I would, if I had the money, get a new one knowing then that I will have a good spare if something goes wrong in the future.
I am just afraid of something going wrong with it and giving the system an unsteady current or a spike in voltage which could damage my new components. What is the likelyhood of that occurring with a 5 year old PSU?
Think of it as buying insurance. You just laid down 500$ on new stuff. And your old PSU COULD fry all of it. So you spend 80-90$ to ensure that either
a) won't happen
b) or if it does your new PSU has a warranty that should cover most if not all of the expenses.
I swapped out my 5+ year old PSU and I am GLAD I DID. I noticed about 5 minutes after I would boot up my PC these past few weeks it would start making this high pitched whinning type sound. Out of fear of the PSU shorting out I logged on to newegg and purchased a new Corsair TX650W.
Well I just swapped it out today and whola! My PC is totally quiet now. I feel so much better having peace of mind that my investment is safe.
Thank you for all of your input.
mgrzTX thanks for your recommendation on the PSU.
HAF922, AMD Phenom II X 4 965, 8GB of Gskill Ripjaw DDR3 Ram, Sapphire HD4870 Toxic Edition, 2 x Terrabyte SATA drives, Corsair TX650W PSU, Windows 7 Home Premium, 22" Samsung Monitor