I have never heard of that. I have used about 20 PSUs and never had a problem just hooking them up. If you get a good one you should never need to worry about such a thing.
Good luck
My Computer
Computer Manufacturer/Model Number
Keeps changing - (Custom)
OS
Windows 7 Professional x64
CPU
Intel Core i7 860
Motherboard
Gigabyte GA-P55-UD4P
Memory
4GB DDR3 Mushkin 1600Mhz @ 7-8-7-20
Graphics Card(s)
MSI GTS250 1GB DDR3 Twin Frozr
Sound Card
Onboard realtek
Monitor(s) Displays
Samsung SyncMaster 24" P2450 + Samsung 20" 2033
Screen Resolution
1920 X 1080 and 1600 X 900 (#2 system 1440 X 900)
Hard Drives
Patriot Inferno 120GB SSD + 3 WD Blue 640GB drives
PSU
Corsair 750 HX Modular
Case
Lancool PC-K62
Cooling
Cooler Master TX3 CPU cooler and 4-140mm and 1-120mm case
Keyboard
Gigabyte USB keyboard
Mouse
Microsoft wireless laser mouse 5000
Internet Speed
7 Mb down 1.5 up
Other Info
System #2: AMD Phenom II X6 1055T (Freezer 7 Pro cooler) - Gigabyte 880GMA-UD2H - WD 500GB Black - 9500GT (1GB) 500W OCZ modular PSU - Antec 200 case. System #3 (LapTop) Core 2 Duo T6670 - 320GB 7200RPM HD - 4GB DDR3 RAM.
I think you are referring to the life expectancy of a power supply and that depends on the quality and the type of usage and demand you will place on a psu.
If you are using an under powered psu for intense purposes expect 8-10,000 hours of life, maybe less, maybe more. If you have a higher wattage psu you can expect double the life.
