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Odd poweradapter lag

B

Baudtler

macrumors newbie
Original poster
Apr 20, 2013
6
0
Hello hello, this would be my first thread in here. I don't know where else to go with this and after some extensive googling around I've found that my issue is rather rare as no one else has spoken of it so far.

My issue is this; When I play games on my Macbook (Mainly World of Warcraft causing this issue), and I play on battery there's no issues with graphical lag at all. Everything runs smoothly - but once I plug in my poweradapter I easily see FPS drops from 60 to 13.
For some reason it seems that my macbook is switching to a lower processing power.
I've only seen people with the opposite issue, that they're slow on battery and fast on the power adapter - My issue is quite odd.

Any thoughts? All ideas are welcome.

Edit:
Here's some specs.

It's an early 2011 Macbook Pro 15"
Processor 2 GHz Intel Core i7
Memory 4 GB 1333 MHz DDR3
Graphics AMD Radeon HD 6490M 256 MB
Running Mac OS X Lion 10.7.5
 
Last edited:
Oh, right. Sorry -

Here we go:
It's an early 2011 Macbook Pro 15"

Processor 2 GHz Intel Core i7
Memory 4 GB 1333 MHz DDR3
Graphics AMD Radeon HD 6490M 256 MB
Mac OS X Lion 10.7.5
 
Have you checked that the energy saver preferences are set up correctly? It could be that the settings for when plugged in are not what you want.
 
Yep

Yea, I fiddled around with them and even restored them.
I disabled the power saving mode as well, so it always runs on the most powerful mode.
No change.
 
Did the SMC a while ago to try and fix it. Haven't tried NVRAM or PRAM yet. I'm not sure it'd do the big difference though. Worth a shot none the less.
 
Check and log the temperature during gaming.

The reason I say this is whilst you are on battery you won't be running he processor at its maximum.

When you plug into the mains the processor can clock to its maximum and apply turboboost. The issue with this is you then hit the max temp and it throttles the CPU and gpu down significantly lower than they are when running on battery.
 
Gav2k said:
Check and log the temperature during gaming.

The reason I say this is whilst you are on battery you won't be running he processor at its maximum.

When you plug into the mains the processor can clock to its maximum and apply turboboost. The issue with this is you then hit the max temp and it throttles the CPU and gpu down significantly lower than they are when running on battery.
Click to expand...

As previously stated, I've disabled the switching between turbo boost so it's always running at max power.
The lag occurs instantly when plugging in the power. It's a software thing, I'm almost certain. As if it thinks that it's supposed to slow down.
 
Baudtler said:
As previously stated, I've disabled the switching between turbo boost so it's always running at max power.
The lag occurs instantly when plugging in the power. It's a software thing, I'm almost certain. As if it thinks that it's supposed to slow down.
Click to expand...

Have you confirmed it's not clocking down as I remember it does on battery regardless of settings. Also turboboost is only avalible when ac power is detected and the thermal conditions of the CPU is right
 
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