Turbo Boost not working - 10.10 GM

vatter69

macrumors 6502a
Original poster
Feb 4, 2013
536
494
Just realized, using the Tool from the Intel Website that my (Ivy Bridge) i7 is stuck at 3.0 GHZ when in fact it should go up to 3.9 if it's cool enough etc. I ran various Geekbenches to create some load but no dice.

A friend of mine running the late 2013 model with the Haswell platform has no issues to dynamically clock his laptop from 2.4 to 2.9, but on Mavericks.

Another friend already installed the 10.10 GM version form yesterday, running the same late 2013 model and it clocks up to 2.9 too so it appears to be an issue with the support for the Ivy Bridge platform under 10.10.

Can anyone else verify this?
 

beosound3200

macrumors 6502a
Nov 23, 2010
684
0
i have a late 2012 imac with i7 and it doesnt happen to me, it turbo-boosts normally to 3.8 under geekbench
 

vatter69

macrumors 6502a
Original poster
Feb 4, 2013
536
494
So after having done a fresh install of the GM version from a USB drive, it finally starts to make use of that Turbo Boost again. Although it just goes up to 3.5 Ghz when it should be 3.7 according to Intel.
 

peabo

macrumors regular
Feb 14, 2008
201
0
So after having done a fresh install of the GM version from a USB drive, it finally starts to make use of that Turbo Boost again. Although it just goes up to 3.5 Ghz when it should be 3.7 according to Intel.
That's normal, you will never see it hit 3.7, 3.5 is as high as it will go.
 

vatter69

macrumors 6502a
Original poster
Feb 4, 2013
536
494
Yep - just installed Boot Camp and Windows 7 and 3.5 is as high as it goes here too.

Bottom line - Yosemite does indeed support Turbo Boost :) Something screwed it up when installing Beta 1-4 over Mavericks i guess.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.