Why Pentium?

[kony]

Hey Kony, since you seem to know so much about fans... what the hell is the
deal with those chipset coolers that have flakey fans? Some of them spin
at >7Krpm and last 6 months max. Is it even possible to make such small
fans move enough air and still last?

They're off-brand/low-quality, small diameter, thin, higher
RPM... essentially all the things that make for shorter
lifespan.

It's possible to make higher quality small fans but it'd
cost more. Even better would be reduction in necessary flow
by having a better hunk of metal under the fan, combined
with a 15-20mm thick fan of at least 50mm diameter.

Manufacturers aren't interested in lifespan beyond the
warranty period in most cases though, so the best course is
to replace whole 'sink-fan assembly or relube the fan (if a
sleeve bearing type) before it begins making noise so the
bearingway isn't chewed up and enlarged (so then whatever
lube is added, is even less likely to stay where it should.
Also once a fan has worn some a thicker lube will help keep
it in the bearing.

They're usually "buried frame" type and easily replaced but impossible to
find, even from distributors. I've been able to find a 45mm diameter
"bury-frame" fan for my GPU cooler at Directron but the 30mm versions
usually used on chipset coolers are just not available anywhere. Do you
know why?

Nope, beyond that the manufacturers of these low-end
products don't want to offer only a fan, instead a more
costly alternative.

Any ideas on where I might find a "quality" version?... or do
the mfrs prefer to sell with a hunk of metal for the extra $$?

I'd just replace the whole 'sink, or in some cases you can
put a normal full-framed fan on if you use longer screws.
It's a bit more difficult if the video card doesnt' have
clearance under it, but I always advise to leave an empty
slot under the video card anyway so there's less heat
buildup and/or better air intake->exhaust in cases where the
card exhausts out the rear through the mounting slot
bracket.

Ultimately the best solution depends on available space and
amount of heat that needs removed. I'd not try to use
another recessed fan if there wasn't a space constraint
requiring it.

 

[kony]

A little over 17 years? that should be long enough..

It's not reliable. All of the known premiere fan
manufacturers are more conservative with their ratings. So
we'd be contrasting multi billion dollar fan manufacturers
putting fans in mission critical systems from computers to
airplanes to hospital equipment), and on the other hand a
small PC manufacturer that doesn't make fans at all, merely
gets them from a third party.

Further, on the product page we see the following:

"MTBF: 150,000 hours
* 150,000 hours of MTBF is measured under the 25C (77F)
ambient temperature.
* MTBF of normal ball bearing Fan: 50,000 hours
* MTBF of normal sleeve bearing Fan: 20,000 hours "

These are clearly deceptive.

1) The MTBF is only at 25C and goes down quickly at higher
temp. It's not hard at all to have a higher temp, 25C is
about average room temp, not heated chassis air temp.

2) MTBF of a normal dual ball bearing fan is between
50-100K hours, so IF only one number is given it would be
75K. They fail to mention that as temp goes up and sleeve
bearing (including S-FDB type) MTBF goes down quickly, ball
bearing MTBF does not. In short, they're playing with the
numbers to suggest the product is better than it is. Beware
of companies that do this instead of providing ALL of the
information.

3) Their picture of the bearing is quite telling. There's
nothing special about it, it's merely a semi-sealed (until
it starts wearing) bearing with a larger oil reservoir than
some (again until it starts wearing, then there will be oil
loss as with any other).

Finally, a spec for MTBF for a bearing is only as good as
the load on it! If you take a *good* bearing and put a
poorly balanced fan assembly around it, or subject the force
in another uneven fashion, that MTBF rating is shot_to_hell.

 

[John Doe]

A babbling troll who says that fluid dynamic bearings are the same
as sleeve bearings. Apparently the troll doesn't even know that
modern high-performance hard drives are made with fluid dynamic
bearings. Apparently this troll is just clueless.


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From: kony <spam spam.com>
Newsgroups: alt.comp.hardware,alt.comp.hardware.homebuilt,alt.comp.hardware.pc-homebuilt,alt.computer,comp.sys.ibm.pc.hardware.chips
Subject: Re: Why Pentium?
Date: Fri, 21 Jul 2006 19:33:31 -0400
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A little over 17 years? that should be long enough..

It's not reliable. All of the known premiere fan
manufacturers are more conservative with their ratings. So
we'd be contrasting multi billion dollar fan manufacturers
putting fans in mission critical systems from computers to
airplanes to hospital equipment), and on the other hand a
small PC manufacturer that doesn't make fans at all, merely
gets them from a third party.

Further, on the product page we see the following:

"MTBF: 150,000 hours
* 150,000 hours of MTBF is measured under the 25C (77F)
ambient temperature.
* MTBF of normal ball bearing Fan: 50,000 hours
* MTBF of normal sleeve bearing Fan: 20,000 hours "

These are clearly deceptive.

1) The MTBF is only at 25C and goes down quickly at higher
temp. It's not hard at all to have a higher temp, 25C is
about average room temp, not heated chassis air temp.

2) MTBF of a normal dual ball bearing fan is between
50-100K hours, so IF only one number is given it would be
75K. They fail to mention that as temp goes up and sleeve
bearing (including S-FDB type) MTBF goes down quickly, ball
bearing MTBF does not. In short, they're playing with the
numbers to suggest the product is better than it is. Beware
of companies that do this instead of providing ALL of the
information.

3) Their picture of the bearing is quite telling. There's
nothing special about it, it's merely a semi-sealed (until
it starts wearing) bearing with a larger oil reservoir than
some (again until it starts wearing, then there will be oil
loss as with any other).

Finally, a spec for MTBF for a bearing is only as good as
the load on it! If you take a *good* bearing and put a
poorly balanced fan assembly around it, or subject the force
in another uneven fashion, that MTBF rating is shot_to_hell.

 

[kony]

A babbling troll who says that fluid dynamic bearings are the same
as sleeve bearings. Apparently the troll doesn't even know that
modern high-performance hard drives are made with fluid dynamic
bearings. Apparently this troll is just clueless.

Clueless one, if I didn't know that I wouldn't have ALREADY
MENTIONED IT IN THIS THREAD.

I'll be content letting you pay a premium for crap generic
fans though, whatever makes you happy.

 

[kony]

This troll apparently really does not know the difference between a
sleeve bearing and a fluid dynamic bearing.

The difference is a marketing department.

 

[Andrew Smallshaw]

It seems you're suggesting computers don't work at all,
since they can and do processes 9600 baud signals as well as
a myrid # of others, given I/O peripherals.

Correct. Anyone suggesting otherwise lacks experience in these things.
Cast your mind back 10-15 years where it was relatively common to hook
up a single machine to several dumb terminals for UNIX use. The machines
at the time could easily support 30-40+ users on serial lines, often at
higher baud rates than 9600. Bear in mind we're talking about 386 or
486 processors with 8450 or possibly 16450 UARTs if you weren't lucky
enough to have an intelligent serial card.

 

[Lee Waun]

I guess this troll also considers "sleeve bearing" to be
a marketing term.

i no longer care why every single post you write starts out with, 'this
troll' but you just are a nuisance so into the kill file you go.

 

[Lee Waun]

John Doe pravi:

What exactly makes me a troll here?

If you say anything he doesn't agree with then you get labelled a troll by
him.

Just killfile him and be done with it.

 

[Miske]

Intel had bigger production of processors. In that time they made
contracts with big pc-produce companies. Now You can read abot ome
companies offering AMD based computers, because of AMD's FAB36 - they
increased production so they can satify the price and quantity demands.
There is always posibility to bild you own pc with processor of Your
choise.

PS
Sorry for mispelling. English is not my primar language