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Windows 8 downclocks CPU in games

O

OUTofPRINT

macrumors newbie
Original poster
Jul 8, 2009
14
0
It's a 15" rMBP with a 2.3 GHz i7 and a GT 650m.

I was looking at the task manager while playing games, and it appears that the CPU is getting downclocked significantly. This has a large effect on the performance of the games, and I don't know how to fix it. I originally noticed it in Black Mesa, but I just saw it in Skyrim too. It makes the framerate drop a lot and makes it really stuttery/choppy. it usually drops down to around 1.2 GHz, but I saw it go down to about 0.7 GHz in Skyrim. Does anybody have any ideas on how to fix this?

I already tried changing the processor power management settings.
I'm using Lubbo's Fan Control to keep the fans on 100%
I'm running it off a Thunderbolt external hard drive, if that matters.

Any suggestions?
 
OUTofPRINT said:
It's a 15" rMBP with a 2.3 GHz i7 and a GT 650m.

I was looking at the task manager while playing games, and it appears that the CPU is getting downclocked significantly. This has a large effect on the performance of the games, and I don't know how to fix it.
Click to expand...
Intel Turbo Boost reduces the CPU-core clock rate, if a CPU-core reaches a certain temperature. The solution is a) better cooling or b) use a real game machine, not a weak rMBP.
 
For me, I can use ThrottleStop to stop the CPU downclocking in bootcamp. However, after I stopped the CPU throttling, I found that my GPU started downclocking and throttling (from 900MHz to 240MHz)... Tried the Nvidia Inspector but it didn't help at all:( The next thing I'll do is probably to install Windows 8 in EFI mode and see if it helps. If not, I'll just simply go to the Apple Store and have a logic board replacement:( (you know what, this is already the second mac I have that has GPU issue. My MBP 2010 had blackscreen issue in bootcamp and sometimes in Mac OS X)
 
Mr. Retrofire said:
Intel Turbo Boost reduces the CPU-core clock rate, if a CPU-core reaches a certain temperature. The solution is a) better cooling or b) use a real game machine, not a weak rMBP.
Click to expand...

Weak? Hardly.

Sure its not the ideal gaming device but its an incredibly fast machine. I use a few of them as Realflow Render nodes at work.
 
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