Is it safe and does it cost much if you....

[dfusion-]

Hey guys last week en now im running my 21.5 imac late 2009 ( C2D ) 24/7, in night with display off, but imac still running programs

my questions is....is it safe? and are my energybills going up FAST?

PS * imac uptime is now 9 days without reboot and still runs smooooooth

 

[elistan]

Apple reports power usage of 35.8 Watts for an idle, display-off 21.5" iMAC. Over 24 hours, that's 0.8592 Watt-hours of energy. At about 17-cents per Watt-hour, you're looking at 53 dollars to keep the iMac on and idle for an entire year 24x7.

http://images.apple.com/environment...Mac_Product_Environmental_Report_20100727.pdf

 

[B.winkle]

Why are you keeping it on 24/7?

 

[rkaufmann87]

Why are you keeping it on 24/7?

Because that is what the manual says to do! It says:

Put Your iMac to Sleep

If you will be away from your iMac for less than a few days, put it to sleep.

 

[old-wiz]

I have a 24" iMac which has been on mostly 24x7 for over a year and a half. The only times I've turned it off has been when I'm on vacation or during a storm. It doesn't draw that much power compared to lots of other things.

 

[kuebby]

I leave mine on pretty much all the time too, unless I'm going to be away from it for a few days. I think I've gotten my uptime to almost a month.

 

[whoda]

Other then for the occasional reboot, my iMac has not been shut down since I bought it in August 2010. I use it every day (except when I was unexpectedly hospitalized for two weeks). It is using the default power settings (sleep mode etc) as when bought new. I have not noticed an increase in my power bills. As for the wonderful storms here in Florida, I have it connected to a rack mountable sine wave power conditioning UPS unit.
Hope this helps.