Kill-A-Watt: AMPs draw on PE2950r3

[Peter Kjellstrom]

On Wednesday 05 March 2008, michalwd1979 wrote:
> Hi Brian,
> I think that there is something wrong with full power measurement. With so
> low pf, the real power would be lower then idle power. Very strange. When I
> was checking my PE2850 (2x Xeon 3GHz, 4G RAM, 3xHDD) pf was always about
> 0.9. The test were made in Europe (230V AC main power) but that should not
> matter.

I have done measurements on many modern servers (including the PE1950). In all 
situations with a single PSU pf has been better than 0.9 during load (and a 
bit lower at idle but >0.8). Most good powersupplies manage >0.95 at load.

Given that a powersupply has lower pf at lower load I'd assume that dual PSU 
machines have lower (worse) pf than single PSU ones. I have not measured this 
though.

/Peter

> Best regards,
> Michael Widlok
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