Linked by Thom Holwerda on Fri 11th Jan 2008 11:57 UTC, submitted by anonymous
Benchmarks "Earlier this week Apple released updated Mac Pros that use Intel's new Penryn processors. Also new is the fact that the standard Mac Pro configuration now comes with eight (instead of four) cores. Of course, what I've been wondering (as I sit here and think about getting a new Mac Pro) is how does the new standard eight-core Mac Pro perform compared to the old high-end Mac Pro? I've gathered Geekbench 2 results for both Mac Pros to find out."
Thread beginning with comment 295402
To view parent comment, click here.
To read all comments associated with this story, please click here.
RE[3]: Back to basic first
by rayiner on Fri 11th Jan 2008 19:38 UTC in reply to "RE[2]: Back to basic first"
rayiner
Member since:
2005-07-06

Sleep mode is nowhere near 10W. Your average laptop battery is only about 55W-HR, and a laptop will easily last a day or two in sleep-mode with a full-charge. That puts the sleep-mode power draw at 1-2W.

To put that into perspective, a single gallon of gasoline has about 36,600W-HR of energy, enough to power a laptop in sleep mode for two to four years.

To put it still further into perspective, powering all the laptops sold worldwide in a year in sleep mode for a year will use about 25 million gallons of gasoline. This sounds like a lot, but the US alone uses that much gasoline in only 90 minutes...

The power savings from shutting down computers is so phenomenally miniscule it's barely worth even posting about.

Edited 2008-01-11 19:44 UTC

Reply Parent Score: 3

RE[4]: Back to basic first
by B. Janssen on Fri 11th Jan 2008 20:40 in reply to "RE[3]: Back to basic first"
B. Janssen Member since:
2006-10-11

That is an interesting perspective you put this into, but I'd say it still is bigger than zero, which is what you get when you shut off your computer.

This is also true for all the other millions of electric devices people keep running on stand-by for no other reason as to be able to switch it on without getting out of the armchair. Which might add another perspective to your's.

Reply Parent Score: 3

RE[5]: Back to basic first
by Joe User on Fri 11th Jan 2008 22:35 in reply to "RE[4]: Back to basic first"
Joe User Member since:
2005-06-29

I actually have "normal" switches that don't leave devices in stand-by for other appliances in my house. I'm conscious about energy savings and this is more important than laziness not wanting to move one's ass to unplug the TV after watching television. Same for the radio, the modem, etc...

Reply Parent Score: 1

RE[5]: Back to basic first
by rayiner on Sat 12th Jan 2008 01:18 in reply to "RE[4]: Back to basic first"
rayiner Member since:
2005-07-06

Who cares if it's not precise zero? It's close enough to zero that it has no measurable impact on the environment.

"Every little bit counts" is a mantra that might make people feel good, but it's not one that is sound from an engineering point of view. If something you do to save energy has no measurable impact, it doesn't matter, and no, the thought doesn't count.

Another bit of perspective for you. You use as much energy in the couple of minutes you wait for your laptop to boot as it takes to keep it in sleep mode for a couple of hours. If you factor in the high energy usage of bootup/shutdown sequences (thanks to hitting the disk so hard), you might not even come out ahead!

Edited 2008-01-12 01:32 UTC

Reply Parent Score: 2

v RE[4]: Back to basic first
by Joe User on Fri 11th Jan 2008 22:32 in reply to "RE[3]: Back to basic first"