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Re: OT - power off probs

Sorry - I didn't count the PSU fan :/ The PSU does have its own built in fan. The spare 350watter has 2 built in fans.

Also, it's proprietary so I doubt it'd be easy to find a replacement PSU.

But it strikes me strange, the board starts powering off as soon as I swopped over the 2 systems - why didn't it start happening with the old system? Because the old system didn't draw as much power?

Cheers - Piers

Gene Heskett wrote:
On Tuesday 27 December 2005 20:12, Piers Kittel wrote:

Even tho it's only about a year old?

A year old psu can have 4 oz of dust bunnies in it, completely blocking any air flow. This user said there was only one fan, the one on the cpu.

Now, I've never seen although there may well be, an example of a fanless psu, but at 240 watts rated, & say 95% efficiency (thats being very very charitable BTW, most are hard put to make 90%) then thats still 12 watts of heat to get rid of by whatever means. With no fan that assumes good radiant efficiency, and good thermal condutivity to the outside world else something is going to get too hot to work. And once an overheat has shut one of these things down (if its not a catastrophic shutdown where the magic smoke comes out) then whatever caused the shutdown is going to become ever more sensitive to over temps, turning itself into a nuisance rather quickly.

With decent psu's being commodity items, carefull shopping will buy you a case of 24 300 watters from the pacific rim people at less than a $20 bill each including shipping. I usually go for the even bigger stuffs, 450-600 watts rated because they'll have 2 fairly quiet, ball bearing rated fans in them, often thermostaticly controlled & running easy, and will last for many years. But they ALL will benefit from an annual blow job administered by a 100+ psi air hose. That one point will extend their working life by 3 to 10 times depending on how much dust they manage to trap.

Who am I to sound like an expert when I don't even have a briefcase?
Just a semi-retired old fart who's been chasing electrons for a living since about 1948. The last 21 years as the CE at a TV station here in WV. Semi-retired because I'm still doing it part time.

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