joelja at darkwing.uoregon.edu
Fri Jul 25 10:25:39 EDT 2003
larger passive heatsinks... low-profile dimm modules in the angled dimm
The fact that the power-supply is essentially exhausting into case despite
the blower is worrysome...
On Thu, 24 Jul 2003, Alvin Oga wrote:
> hi ya
> any system where the cpu is next to the power supply is a doomed box
> if the airflow in the chassis is done right ... there should be
> minimal temp difference between the system running with covers
> and without covers
> cpu fans above the cpu heatsink is worthless in a 1U case .. throw it away
> ( unless there is a really good fan blade design to pull air and move air
> ( in 0.25" of space between the heatsink bottom and the cover just just
> ( above the fan blade
> lots of fun playing with air :-)
> blowers in the back of the power supply doesnt do anything
> - most power supply exhaust air out the back y its power cord
> and should NOT be blocked or have cross air flow from other fans
> like in an indented power supply ( inside the chassis )
> c ya
> On Thu, 24 Jul 2003, Bari Ari wrote:
> > Mitchel Kagawa wrote:
> > >Here are a few pictures of the culprite. Any suggestions on how to fix it
> > >other than buying a whole new case would be appreciated
> > >http://neptune.navships.com/images/oscarnode-front.jpg
> > >http://neptune.navships.com/images/oscarnode-side.jpg
> > >http://neptune.navships.com/images/oscarnode-back.jpg
> > >
> > >
> > >
> > The fans tied to the cpu heat sinks may be too close to the top cover
> > for effective air flow/cooling. Measure the air temp at various places
> > inside the case when closed and the cpu's operating. Try to get an idea
> > of how much airflow is actually moving through the case vs just around
> > the inside of the case.
> > Try placing tangential (cross flow) fans in the empty drive bays and up
> > against the front panel and opening up the rear of the case.
> > http://www.airvac.se/products.htm
> > The power supply has fans at its front and rear to move air through it.
> > The centrifugal blower in the rear corner may not be helping much to
> > draw air across the cpu's. The same principle applies to the enclosure.
> > Try to move more air through it vs just around the inside. The cooler
> > the components the lower the failure rate.
> > Bari
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Joel Jaeggli Academic User Services joelja at darkwing.uoregon.edu
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