As always, great pictures.
one part i take exception to,
"ASUS' power delivery system is among the best in the business at this time. An ADP3228 PWM controller commands an 8-phase solution, made up of low-DCR, solid ferrite-core Yageo inductors, and ultra-low ESR Nichicon capacitors. However, we feel that the two 270uF input power filter capacitors used to remove any ripple in the 12V line coming from the PSU were somewhat undersized for the task. We would like to see capacitors used here which provide at least 2000uF of total supply capacitance."
Why ?
i used to work with an electrical engineer who always had
the same suggestion in meeting. "add capacitors". we worked
for a defense contractor that tended to not lay people off. he
was a nice guy, but not a great engineer. he had transitioned
into a manufacturing supervision job.
having sat in on loads of technical meetings with power
supply design engineers talking about ripple and all the other
technical aspects of power supplies, and having known "Manny"
who always in favor of adding capacitors to any circuit, i can't
help but wonder - why does AT want to see more capacitance ?
i'm not saying it's necessarily wrong; it may be an astute
technical judgment.
is it because of experience with motherboards that OC'ed
better that had 2000+ uF of total capacitance ?
is there any chance that AT could have a follow-up interview
with Asus' power processing & analog engineers, to talk more
about it - ripple, phase vectors, the works.
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