CPU B using more power than CPU A?

macuserx86

macrumors 6502a
Original poster
Jun 12, 2006
622
3
Looking in iStat menus the other day, I noticed that CPU B was consistently using more power than CPU A (not more Volts, more amps and watts). Is this normal? is this bad?
Thanks in advance for the help!
 

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zachsilvey

macrumors 6502
Feb 5, 2008
444
3
Battle Ground
The balance of processor usage between cores is never the same. If you are using an app that can only use a single processing core then it will increase the load on that cpu thus increasing the power draw on that core.
 

macuserx86

macrumors 6502a
Original poster
Jun 12, 2006
622
3
So it would appear that this is normal then. I just got scared for a minute; I'm very protective of my 42 lb baby :D
 

J the Ninja

macrumors 68000
Jul 14, 2008
1,824
0
I've found it's best to not stare at the sensors display in iStat Menus too long. :) You start getting paranoid. (Although it does tell you interesting things about why battery life mysteriously goes away in Snow Leopard)
 

zachsilvey

macrumors 6502
Feb 5, 2008
444
3
Battle Ground
I've found it's best to not stare at the sensors display in iStat Menus too long. :) You start getting paranoid. (Although it does tell you interesting things about why battery life mysteriously goes away in Snow Leopard)
I get way to obsessed with the stats that iStat gives me, the problem is that I also set up the iPhone app so I can see stats wherever I am.
 

macuserx86

macrumors 6502a
Original poster
Jun 12, 2006
622
3
I've found it's best to not stare at the sensors display in iStat Menus too long. :) You start getting paranoid. (Although it does tell you interesting things about why battery life mysteriously goes away in Snow Leopard)
Ya, that's true. I like to look at the processors one though; I'm still amazed that I have 8 physical cores in my computer. I went from a 12" PowerBook to a 2.8 GHz octo Mac Pro. That's like going from a Civic to a Zonda F roadster :D
 

300D

macrumors 65816
May 2, 2009
1,284
0
Tulsa
The OS frequently switches the core an application hogs to balance thermal loading of the die.
 
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