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New 250W?
Definately try getting a 300W
~~~)-Steven----
New 250-Watt vs 300-Watt
This is a meaningless comparison. A quality company's 250-Watt power supply will be more powerful than a cheap vendor's 300-Watt. The rating depends on how you do your marketing vs engineering tradeoffs.

Other factors are regulation stability, voltages delivered and noise. Many cheap power supplies are way out of spec on some or all of these. Power supplies that don't have at least the UL and CSA logos are sure to be piss poor, but some that do are too.

I have had many strange problems and instabilities go away completely after replacing the power supply with a quality unit.

The 250W supplies I use easily support a 1.4-GHz Athlon, two IDE drives, a CD-ROM and a CD-RW, though I'd certainly use 300W for a server - it's likely to be trouble free longer.

Quality counts.
[link|http://www.aaxnet.com|AAx]
New Right On brother..
[link|http://www.pcpowercooling.com/home.htm|PC PowerCooling]

These guys have been around since the 8086. Believe I first heard of them from Jerry Pournelle (!). Dunno how their QC has held up under competition from Bangladesh and the ascendance of the PHB in all of Murican 'what-passes-for' life, but they *were* first-rate design and materials.

[ps ignorance rant]
I cannot imagine.. putting a 'server' into operation for something more important than saving old Freecell scores -- without the Best PS available, and also *a bloody Working Temp Alarm* with multiple sensors for HD, CPU, enviro of case... All now so *cheap* to do - too. But: an extra step.

But then... I ain't no IT Pro: I actually understand something about electronics, heat, ripple - cheap aluminum electrolytics often substituted: NOT rated "low-ESR" (equivalent series resistance, that is). These especially for the lo-voltage sub-circuitry for those GHz goodies... thus on the MB and hard to envision wholesale replacing through those 4, 6? layers. Cheap mobo? for a Server ?!

Imagine what combos of the above factors can do to: er MILLIONS of logic-level switches, as that old 120 Hz or much likelier (switching freq) sawtooth + glitches - comes and goes. Odd reboots (even for Billyware?). "Can't write to disk 0" ?

It always amazes me that, people will entrust a (once) $1K CPU and a (once) $500 HD, $350 video card to: a $8 (qty) China PS. And never worry pretty little heads as in, "what's a power supply?"

Me? even for my el-cheapo Korean PS in the e-Machine: I at least measured the ripple; looked with a scope -- and will do so at least as frequently as thinking about CMOS battery. Scope optional - decent Fluke RMS meter will do = under load = FULL load. (make a CD from another via HD buffering and calculating Billy's fortune in background - OK compile a kernel too, in that Other OS) Then you *know* (at least today).

[/rant]

Yeah.. it's just One More thing to add to the list, "are my IIS patches checked.. since last week?"



Ashton Crank
New I understood about two words
Dunno about this fluke RMS stuff, but I understood PC Powercooling. Got a power supply from them when my Tandy 1000 supply went googoo (yes, they've been around that long) and had no complaints.

French Zombies are zapping me with lasers!
New RMS vs. "average responding" meters.
In past 5-10 years, cost of making a decent root-mean-square responding meter has come way down. This is important when looking for the kinds of interference as would screw up digital logic (particularly at the lower and lower voltages). So you want to read that "spike" with reasonable accuracy - though you'd understand a lot more, if you saw its waveshape on a scope, too.

We lazy folk look at it this way: would you rather set up a battery of utilities; see if you can sleuth out mysterious digital events - or just see first, if there's a simpler explanation? (I'll bet lots of good mbs have been tossed.. and lots of wasted hours running logic tests, because of bad PSs.)

And no, Fluke isn't the only choice - but RMS is pretty important.. and a high-enough freq. response as matches the switching freq. - in order to "believe".


A.
New To make it all perfectly clear . . .
. . . RMS stands for "Root Mean Square". There, isn't that better?


[link|http://www.traceengineering.com/technical/tech_notes/tn2.html|Explanation]
[link|http://www.aaxnet.com|AAx]
     CheapoCase question. - (bepatient) - (8)
         Underpowered, I reckon. - (pwhysall) - (7)
             Not dual processor... - (bepatient) - (6)
                 250W? - (Steven A S) - (5)
                     250-Watt vs 300-Watt - (Andrew Grygus) - (4)
                         Right On brother.. - (Ashton) - (3)
                             I understood about two words - (wharris2) - (2)
                                 RMS vs. "average responding" meters. - (Ashton)
                                 To make it all perfectly clear . . . - (Andrew Grygus)

And we had great cheese together.
39 ms