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HP MediaSmart HP Home Server “Power Consumption”

There’s a lot of talk internally at Microsoft by users of Windows Home Server. Many have built them themselves and others have purchased or side-graded to an HP MediaSmart.

I had noticed that my DIY (Do It Yourself) Home Server was noisy and HOT. Like room-warming hot. I kept it in a closet and it was hot to the point of dangerous. That got me thinking about power consumption.

Here are some numbers that I was given permission to share. These are just one person’s numbers using a “WattsUp?” device. These aren’t official, but they do, I suspect, reflect a reasonable reality. Thanks BethD and BethD’s Mystery Friend!

“I took power measurements on your new HP MediaSmart Server EX475 with my WattsUp? Pro power logging meter. There is a power data log in the meter that I can provide if anyone wants to see it.

Test conditions:

  • EX475 has two 500 GB HDD

  • Server and all network hardware on APC BackUPS Pro 650

  • Measurements taken for Server only

  • Server ran for 15:45 hours:minutes

  • Server room temperature 60 deg F

  • Server streamed music to two Roku SB Radios for 5 of 15 hours

  • Server performed three PC backups during the measurement period

  • Min/Max measurements do not show Server start up, only shows running min/max data


  • Volts: 112 min, 120 nominal, 124 max

  • Watts: 46.5 min, 52.2 nom, 80.2 max

  • Amps: .40 min, .41 nom, .63 max

  • Power factor: 1.00

  • kWh during measurement period: 0.841

  • Calculated kWh monthly average: 38.0

  • Calculated cost: $3.00 per month @ $0.079 per kWh

The HP data sheet does not show power consumption! But I found a UK reference showing EX475 (two drives): ~60W idle state, ~73W full load, so this data supports that claim.

Your previous WHS Beta PC was the ShuttleX and it used 150 watts nom and heated up the closet so much that I had to put in an exhaust fan. The HP Server has had no effect on closet temperature.”

Windows Home Server, HP, HP MediaSmart Server, HP Server, WHS, Beta, Power Consumption, Factssheet, Microsoft

Source:→ Scott

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