PSU Voltage accuracies are important? Any evidence or just hype?

[Merovingian]

So I friend of mine who graduated caltech recently tells me that voltage accuracies are extreamly important to system stability and somewhat safer for your hardware. How much of this is B.S. I don't know but he swears by antec truepower and truecontrol PSU's for this purpose. Does anybody have any articals I can read to support this or at least some amount of evidence?

 

[glugglug]

I replaced my Antec 350W PSU with an OCZ Powerstream 520 because the undervoltage on the 12V line was causing frequent crashes. (5 hard drives puts a lot of strain on that line).

 

[JustAnAverageGuy]

The line voltages don't have to be 12.00, 5.00 and 3.30, but you certainly don't want them at 14.68, 7.82, and 4.8 😉

Most companies state that +/- 5% is safe. Most reputable companies set the tolerance at +/- 3%

 

[NeoPTLD]

Keeping accurate voltage in steady state isn't anywhere near as important as having minimal voltage jumps under rapidly changing load conditions(high dI/dt rate, such as when you insert a disc into CD-ROM drive or suddenly load the videocard)

 

[Calin]

Remember that increasing voltage can make overclocked processors more stable? Decreasing voltage under the recommended value can make non-overclocked processors less stable. Also, rapid voltage variations can affect digital electronics.
Having over-voltage lines is dangerous for the extra heat it generates (let's assume that the extra voltage is nothing so important as to destroy junctions by itself)