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Alienware Mx15 Dramatic performance drop on battery.

post #1 of 8
Thread Starter 
I have a brand new Alienware Mx15, but when unplugged from the power the fps drops from 85 to 20.

- Stealth mode = off
- All options performance wize are on highest settings, asin in windows/command center of alienware
-Trottlestop program settings are on highest (prevents downscaling of multiplier)


Why does my performance drops this much when I unplug the power?! I really don't care about battery life since i have a total of 3 x 9 cell battery's.


Specs:

- i3 @ 2.4GHZ
- 3GB DDR3 1333Mhz
- HD5870 1 GB
- 500GB HD

Thanks allot for the help.

Tom
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post #2 of 8
I expect the CPU will underclock itself when you disconnect the charger. You can check this by downloading THIS

Once you have downloaded that look at the CPU information. Look for core speed and if it drops when you disconnect the charger. If it does drop then it underclocks itself when not charging to save power. If i doesn't drop then that isn't your problem and you should think about ringing Alienware up.

Then disconnect the charger and retake and save a print screen.
post #3 of 8
Thread Starter 
Quote:
Originally Posted by Jamyy10;13571923 
I expect the CPU will underclock itself when you disconnect the charger. You can check this by downloading THIS

Once you have downloaded that look at the CPU information. Look for core speed and if it drops when you disconnect the charger. If it does drop then it underclocks itself when not charging to save power. If i doesn't drop then that isn't your problem and you should think about ringing Alienware up.

Then disconnect the charger and retake and save a print screen.


When I have the charger in, the multiplier is x 18. Making it 2400Mhz. But when I disconnect the charger, the multiplier goes to 5/8 making it 600-900Mhz. And it seems that Throttlestop is not really working.
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post #4 of 8
Yup, that's most likely the problem right there.

Laptops generally have more power-saving features built in that some applications won't overcome. Sounds to me like the problem is that Throttlestop isn't working properly with the M15x.

Speaking of which, it's M15x not Mx15.
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post #5 of 8
Also your 5870 is going from 700/1000 to 300/450 thus far I haven't found a way around it.
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post #6 of 8
Quote:
Originally Posted by HighVoltache;13582917 
When I have the charger in, the multiplier is x 18. Making it 2400Mhz. But when I disconnect the charger, the multiplier goes to 5/8 making it 600-900Mhz. And it seems that Throttlestop is not really working.

I thought so, i have seen this happen many times. What i would do is have a nose through BIOS and see if you can find anything like power save mode or energy saver and if you do disable it.

On a side note i would download HWMonitor and see what temps you are getting. I say this because i bet you any money that the thermal paste is dry (unless it is thermal tape or even thermal pad) on the CPU and GPU.
post #7 of 8
tried the obvious changing the power settings in control panle?!
     
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post #8 of 8
Quote:
Originally Posted by HighVoltache;13582917 
And it seems that Throttlestop is not really working.

ThrottleStop was not working because you didn't have it setup correctly. The Alienware M15x uses Chipset Clock Modulation throttling to slow down your CPU to a crawl. If you look in the ThrottleStop Chip column of your second picture, it shows this is at 37.5% when it should always be at 100.0%. The result is that your CPU is being throttled to less than half of its rated speed.

ThrottleStop was specifically designed to fix this problem on this laptop model. All you needed to do was put a check mark in the Chipset Clock Mod box and make sure that is set to 100.0%. I realize that this is an old thread so I hope you got this figured out long ago. It would also be a good idea to upgrade to the latest bios which has less of these throttling issues.

For ThrottleStop to work you also have to click on the Turn On button. Monitoring mode won't fix anything.
Edited by unclewebb - 7/16/11 at 6:25pm
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