Re : Is there really a difference in Intel and AMD approve..

Archived from groups: alt.comp.hardware.homebuilt,alt.comp.hardware.pc-homebuilt (More info?)

"-Alby Hewlet" <bogus@nowhere.net> wrote in message news:<hqmdnbbTQ7XHAyrdRVn-hw@comcast.com>...

>> I've also learned that you can't trust mobo voltage reporting
>> at all and must check voltages with an accurate meter (digital)

> Even then you may be up the creek. I just finished working on
> a system where the problem was the power supply. Had 350 wt ps
> in it. All voltages, measured at the molex connector, when it
> was plugged into the motherboard and turned on, measured within
> specs, yet it couldn't boot the system. A cheap 250 wt spare
> I had in the parts bin booted it perfectly every, so you can't
> tell just by measuring the voltages either. Well, you can if
> you get a bad reading, but all good readings don't mean the ps
> is good. If I have it figured out correctly, thanks to Ric in
> another NG, the RC circuit regulating the power ready voltage
> wasn't rising fast enough. With out a scope you can't detect
> that. If it comes up too slowly, the system won't boot.

I had that problem with my old FIC PA-2007 mobo (VIA chipset). It
wouldn't work with my cheapo PSU unless I hit the reset button, but it
had no problems with an ancient IBM brand PSU that contained about
twice as many parts. The cheapo's power-ready circuity consisted of
just a transistor and an R-C network while the IBM's was on a separate
circuit board and had a comparator and some precision resistors and
measured not only the time delay but also all the voltages and even
checked for operation of the power oscillator. I didn't have an
oscilloscope, so I had to pay with R-C values in the cheapo PSU until
the mobo would boot reliably.