I have a 8 year old PSU that i still use on a P4 system, it's been used a lot over those 8 years and still solid as a rock, it's generic as well...
I have had 2 450W generics, one died after 4 months the other still going strong
after years of usage...
I am trying to work out if branded PSU's are a bit of marketing strategy or not..?
Is it just a case of the generics giving you the odd restart or BSOD now and again ..?
You can run a surfing, light application - "home style" PC on a generic lump of dog-doo for years, becuase it's never taxed. Most of the PSU's cannot give out thier stated wattage and certainly not for any length of time.
Now, if you're running a gaming rig with high qaulity, high parts DO NOT trust a generic PSU. You need a proper branded PSU, like Corsair, PC Power and Cooling, Antec, Silverstone etc - some brands are better than others but all will be capable of doing the job unlike your gen PSU.