rMBP 15' EFI v1.0 Throttling issue?

mattlovell

mattlovell

mattlovell

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21 Nov 2011
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Had this issue now since updating the EFI just after I got my Macbook. For anyone who doesn't know its an issue where the MB starts aggressively throttling down the CPU and GPU, possibly related to sleep. Very annoying if you like to play games under windows bootcamp, as nothing short of an SMC reset will fix it, and only temporarily at that.

Just wondering how many other people are experiencing it / have found a workaround or have any info on when Apple might get their act together and update the EFI! :confused:
 
Yeah I'm keeping track of the MacRumours thread, seems to be the most active of the numerous threads about it on multiple sites!

Think I have noticed it on OSX although not tested it so can't know for sure.

Driving me nuts now, just feels like its tainting an otherwise more or less perfect (in my opinion!) machine.
 
N19h7m4r3 said:
Hey chaps, have a look at the Intel Power Gadget which actively shows your CPU frequency and power usage.

http://software.intel.com/en-us/articles/intel-power-gadget-20

I've noticed my 2.6Ghz seems to idle between 1.2Ghz and 1.5Ghz, and it usually runs up then after I run something that needs some power.
When running 4k video from here http://e-nautia.com/vanden/disk?p=2148840
after downloading it I've seen my CPU average at 3.4Ghz, which instantly drops down to around 1.2 again once it stops.
Click to expand...

Isn't this just Speedstep or Turbo Boost? After it drops to 1.2, if you then run the video again, does it go back up to 3.4ish?
 
Last edited:
Ah right. Personally, I have managed to fix the problem I was having in bootcamp (a windows power issue, which I'm astonished I didnt think of!) and can't say I have noticed any problems in OSX, so perhaps I am actually one of the lucky ones who doesn't seem to have the bug. I'll test out those monitors later today and post what I find.
 
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