MPB Throttle problems

mrdice87

macrumors member
Original poster
Aug 30, 2006
56
0
My 2.0GHz MBP rarely ever throttles the processor. Coreduotemp shows it running at the full 2.0GHz even under 1-2% load. Every once in a while it will jump to 1.5GHz for a few seconds, then go back up... and it never passes through the in-between frequencies. Anyone know why?




P.S. it is does this on battery power and when plugged in...
 

mad jew

Moderator emeritus
Apr 3, 2004
32,199
6
Adelaide, Australia
Is there a processor drop down menu in the Energy Saver pane of System Preference where you can pick the CPU's performance? If there is and the CPU is set to Highest, then I doubt it'll get scaled back very easily during regular usage. If there isn't such a list/option, then just ignore me and I'll go back to my knitting.
 

JDN

macrumors 6502a
Sep 7, 2006
520
0
Lund Sweden {London England}
mad jew said:
Is there a processor drop down menu in the Energy Saver pane of System Preference where you can pick the CPU's performance? If there is and the CPU is set to Highest, then I doubt it'll get scaled back very easily during regular usage. If there isn't such a list/option, then just ignore me and I'll go back to my knitting.
No there isnt im affraid.
 

NJuul

macrumors 6502
Mar 15, 2006
492
0
Boston
I think it's a bug in CoreDuoTemp related to the 10.4.8 update. On my MBP CoreDuoTemp almost always shows the CPU as running on max since the update, but I'm quite confident that Tiger still throttles the CPU. I have one of the first MBPs, and it has a whinning noise (haven't gotten around to getting it fixed yet) whenever the CPU is not running on max. And it's still there when there's low CPU utilization, though CoreDuoTemp shows a CPU frequency of 1.83 (max). Battery life haven't decreased either.
 

andrewmulligan

macrumors member
Oct 9, 2006
63
0
mad jew said:
Is there a processor drop down menu in the Energy Saver pane of System Preference where you can pick the CPU's performance? If there is and the CPU is set to Highest, then I doubt it'll get scaled back very easily during regular usage. If there isn't such a list/option, then just ignore me and I'll go back to my knitting.
JDN said:
No there isnt im affraid.
Yeah, that's kind of annoying that it's not on the Intel Notebooks. On my iBook there was a small whine when it was processing on high and now I have one on my MacBook (thinking of trying to get it fixed by AppleCare) so it woule be nice to redudce the processor usage.

BTW, my MacBook usually runs at 1.5GHz.