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- Are branded PSUs worth it?
Re: Are branded PSUs worth it?
I'm sure you feel 20 lights and fans is significant- it
isn't. , nor are light load components ike sound or TV card.
Here we see one of the problems. 7 months is not evidence
of anything. A PSU is not meant to run for 7 months, it's
meant to run for the life of the system. You have no reason
to believe the generic will last as long as a good PSU, and
it may easily damage other parts when it fails (or
progressively, during use).
If your mobo software shows it right-on-spec, it probably
isn't right-on-spec, rather it's over spec because the
sensors tend to read lower than actual values. It is
essential to measure voltage at the PSU connector to the
powered equipment, as that is the only place that determines
if the PSU is properly outputting the rated voltage per
Certainly dust can increase temps, but for the most part
generics routinely fail because of design/components, not a
little dust. Fans are definitely a major issue though,
generics usually have poor generic sleeve-bearing fans that
are subject to seizure.
Remember; if there weren't vast differences, the expensive
ones wouldn't even be out there. Nobody would spend 3X as
The FACT of the matter is that real testing proves the
difference. Put a load on a PSU, see if it pops and how
well it performs. It is certainly possible to run a modern
box from a generic PSU, so long as the actual power
requirement of the system is less than the true power
capability of the generic PSU, _NOT_ the labeled capacity of
the generic PSU. It's rather easy and reproducible to blow
up a generic psu by simply loading it to the output on the
label and leaving it running. IMO, that's fraud.
OEMs generally do not cut corners in PSU construction. They
do tend to use PSU with lesser wattage output but comparing
an OEM 300W to a generic 400W, it's no contest, the OEM PSU
is usually better.
OEMs already know that the "cheapest" thing to do is not to
cut so many corners that systems fail under warranty.
Generic PSU manufacturers do not refuse to sell to OEMs, on
the contrary they would LOVE to have high volume OEM
sales... but OEMs qualify parts and choose better PSU.
Agreed. Listen to those who have done testing to the point
of failure... PSUs that seem to work for a few months are
not evidence- PSUs that fail are evidence. Knowing a
failure threshold lets one determine the actual capability
of a PSU and only then can they gauge whether that generic
can be derated enough to be appropriate for any particular
system in the long-term. Otherwise where is the savings, if
you have to buy another PSU when the first one fails?
If you know a 500W generic can output 280W, and that's all
the system needs (would be a reasonable ballpark figure for
the system you described above) then that gets the system
running. Multi-hundred dollar system running off a PSU
proven inferior for a $20 savings.... bad system choice-
anyone can build unreliable boxes. 7 months isn't even
1/10th of the lifespan one should expect from a modern
system IF they chose to run it that long, and indeed, the
average system these days is already a few years old.
- larry moe 'n curly
August 30, 2005, 12:20 am
Re: Are branded PSUs worth it?
20 lights & 10 fans? What about tail fins? ;)
5-7% over/under voltage may not damage anything, but the protection
circuits in PSUs don't trigger until about -+15-20%, and the surges I
referred to are much worse than that.
Mobo monitors can't be trusted unless verified, and voltage
specsmanship is just trivia because what really matters is how well the
voltages stay within tolerances under any load or temperature.
So it must have been dust that got to those HDs installed with only
1/16" of clearance or those Taiwan electrolytic capacitors made with
faulty electrolyte (www.badcaps.net) that failed 90% sooner than
average (sometimes even in storage)? Just how do fans made with sealed
bearings suffer bearing failures because of dust? And wass it dust
that caused some 16V capacitors in my Deer or Powmax to receive 50V
More likely they work fine because they're good enough for most users,
who rarely need more than 200-250W.
Why would some companies go to the trouble of using bigger
transformers, heatsinks, and capacitors if they didn't matter? After
all those components are internal and not noticed by 90% of the
consumers and not advertised (except maybe by PC Power & Cooling),
unlike lights, pretty paint jobs, external fan and voltage controls,
and sheathed cables. Also some OEM PSUs have unusual features, such as
fan speed that increases with load and not just with temperature or
protection that activates if the fan doesn't spin or doesn't draw the
right amount of current. Why would manufacturers include such features
if they or their OEMs didn't think they helped?
A few years ago I did see a brand-new eMachine in a store with a Powmax
PSU, but otherwise every OEM PSU I've looked at was high quality, such
as Delta, Astec, Newton, Lite-On, NMB, or one of the better Channel
Wells (their quality varies from junk to Antec TruePower), and those
PSUs were crowded inside because their components were so larger than
Re: Are branded PSUs worth it?
True, I'd rather have a lower ripple 5-7% overvoltage than a
PSU with marginal capacity that intentionally overvolts to
give it more recovery time and lax OVP too... that's
essentially what they're doing to try to squeeze more
capability out of a marginal supply.
Plus, those marginal capacitors are essentially being
superceded by the caps on boards, mainboard, video card,
hard drives- all doing more filtering to make up for the
ripple not only to the components they're soldered onto but
whole system. That accelerates wear of even "good" quality
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