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Re: Alpha ES45 buildd

On 9 Apr 2012, at 19:23, Lennart Sorensen wrote:

> On Mon, Apr 09, 2012 at 07:15:50PM +0100, Tim Cutts wrote:
>> That's what we would rather happened to them, but they do need to leave our data centre; we're close to our power limits, and we could run quite a lot of stuff on the power those Alphas use.  :-)
>> Goetz was one of the two official buildd machines when for lenny, so I know it's up to the job...
> How much power does an ES45 use?  Just curious.  Obviously a lot more
> than my PWS433.

Our data centre manager told me the following:

> These ES45's have 3 psu's, and they require 3 x single phase feeds, one
> to each psu. 
> With 3 psu's the server config becomes n+1.
> HP suggest 16amp supply per psu, the usual standard, which is more than
> adequate.
> One day many moons ago, when one of ours was in full flight, we measured
> 1 + 1.5 + 1 amps.
> 3.5 amps in total, approx 800 Watts.
> I'm sure you have been here:
> http://h18000.www1.hp.com/products/quickspecs/10994_na/10994_na.html
> HP say that in normal conditions the consumption is approx 980 Watts,
> which equates to 4.25 amps. 
> That's not far away from what we saw, and ours wouldn't have had all of
> the io slots filled up etc...
> HP then suggest 5.7amps total for a fully populated server going flat
> out - well that won't happen, something will break first!

Hope that helps!


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