Enermax EG375P-VE PSU

[Jack Gillis]

My old PSU gave up the ghost a few days ago and I had to replace it. I
came across a flattering review of the Enermax EG375P-VE at
www.cluboverclocker.com/reviews/power/enermax/eg375p-ve/ and decided it
would do. I found one at a local mom and pop computer shop so I bought
it. It went in just fine and the machine fired up an ran with no
problems. The only puzzle I had was what to do with the FMC connector
from the PSU as there is no header for it on my Biostar MB (AMD Duron
1.3). Mom and Pop said just to secure it somewhere and leave it
unconnected. That I did.

There are two features that don't seem to work though. As I understand
it, both PSU fans (intake and exhaust) are supposed to run for a while
after shutting down the computer so that the remaining hot air in the
case gets exhausted. They don't. They shut down with the computer. Is
my understanding incorrect?

And, the fan speed potentiometer has no effect. The fans run at the
same speed regardless of the pot setting.

Perhaps both oddities occur because of not having the FMC connected.

Does anyone know what is going on here with the fans?

Thank you for your thoughts.

 

[GT]

My old PSU gave up the ghost a few days ago and I had to replace it. I
came across a flattering review of the Enermax EG375P-VE at
www.cluboverclocker.com/reviews/power/enermax/eg375p-ve/ and decided it
would do. I found one at a local mom and pop computer shop so I bought
it. It went in just fine and the machine fired up an ran with no
problems. The only puzzle I had was what to do with the FMC connector
from the PSU as there is no header for it on my Biostar MB (AMD Duron
1.3). Mom and Pop said just to secure it somewhere and leave it
unconnected. That I did.

There are two features that don't seem to work though. As I understand
it, both PSU fans (intake and exhaust) are supposed to run for a while
after shutting down the computer so that the remaining hot air in the case
gets exhausted. They don't. They shut down with the computer. Is my
understanding incorrect?

And, the fan speed potentiometer has no effect. The fans run at the same
speed regardless of the pot setting.

Perhaps both oddities occur because of not having the FMC connected.

Does anyone know what is going on here with the fans?

Thank you for your thoughts.

I may be sadly uneducated in the working of the modern PSU, but I have never
heard of one whose fans continue to induct and exhaust air after power off.
Any remaining hot air in the system is supposed to work its way out during
the 8-12 hour night break that most computers get. I stand to be correced,
but I don't ecxpect your computer fans should keep running (PSU or
otherwise) after you press power off.

 

[Jack Gillis]

I may be sadly uneducated in the working of the modern PSU, but I
have never heard of one whose fans continue to induct and exhaust air
after power off. Any remaining hot air in the system is supposed to
work its way out during the 8-12 hour night break that most computers
get. I stand to be correced, but I don't ecxpect your computer fans
should keep running (PSU or otherwise) after you press power off.

Thank you.

That is what I thought also but the fourth sentence in the review I
linked to says, "The fans continue to run after power down for up to 2
minutes to help cool you system down to a safe level."

I wonder what that means.

Go figure

 

[SteveH]

Thank you.

That is what I thought also but the fourth sentence in the review I linked
to says, "The fans continue to run after power down for up to 2 minutes to
help cool you system down to a safe level."

I wonder what that means.

Go figure

It even says this on the Enermax site. So you either live with it, or as it
doesn't do what Eneramx say it does, take it back to the retailer. Its
possible of course that this fan staying on function is based on how hot the
PSU gets, and your's isn't getting hot enough to trigger it.
However, the fand speed controller on the back not working sounds like a
definite fault, which I would have the retailer test.

SteveH

 

[kony]

That is what I thought also but the fourth sentence in the review I
linked to says, "The fans continue to run after power down for up to 2
minutes to help cool you system down to a safe level."

I wonder what that means.

Keep in mind that the reviewer is clueless.
It's hard to judge power supplies based on web reviews,
because kids let urban myths dictate, in addition to
potential influces like a free power supply, advertising,
eye-candy or any number of non-relevant details.

Take for example their quote, "Nothing alarming, although
the 12v line is .13v lower." In other words, the reviewer
doesn't even understand that a a 12.03V reading is BETTER
than a 12.16V reading, that it's not a contest where
highest-number-wins, but rather,
most-accurate-regulation-wins, ignoring other factors of
course.

That doesn't make Enermax junk, but almost every name-brand
at the same price-point is better. Enermax rates for
peak-wattage, not sustained. Therein lies the problem, that
one can't base a purchase on one of the primary selection
criteria- the wattage output.

Even so, there is no useful purpose to having PSU fans
running after system shuts off. What it would do is simply
put unnecessary additional load on the 5VSB circuit- one of
the common failure points on an ATX power supply. There is
no benefit to further airflow after system shuts off, as
system is no longer producing heat and if anything it could
be BAD because it would cause a more rapid thermal cycle.
Not to suggest it would be really bad, just not something
slightly useful beyond a marketing tool.

 

[Jack Gillis]

Keep in mind that the reviewer is clueless.

Probably so, but several other place including the Enermax site mention
this fan staying on phenomena too.

No big deal, just curious.

Thank you.

-- much snipped ---