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Can you run games on a laptop under battery power?

post #1 of 12
Thread Starter 
(this is my first laptop)

So ... I've been playing HomeFront all maxed out in DX11 on my new laptop, an MSI GT780DXR. Everything in the game ran great. Then I went visiting with my new laptop. Under battery only, I fired up HomeFront just like at home ... but it ran terrible. It was slow, laggy, jerky, unplayable. I found a power plan option in the win7 Control Panel called "High Performance" and selected it, but there was no change. Back at home, under A/C power, everything returned to normal. What happened? How do I fix this? Do I need win7 Ultimate?




post #2 of 12
Under Power Options in cpl, click on Change Plan Settings > Change advanced power settings > Change settings that are currently unavailable.

Once there, make sure Processor power management Maximum state is 100%

If that doesn't work, grab msi afterburner to check whether your GPU is running at full steam.
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post #3 of 12
Thread Starter 
Quote:
Originally Posted by fluxlite View Post
Under Power Options in cpl, click on Change Plan Settings > Change advanced power settings > Change settings that are currently unavailable.

Once there, make sure Processor power management Maximum state is 100%

If that doesn't work, grab msi afterburner to check whether your GPU is running at full steam.

Thanks for the reply.

I looked there a few times for "CPU". Never saw "Processor". I see it now. Here are the current settings:

Minimum Plugged in: 100%
Maximum Plugged in: 100%

Minimum On battery: 5%
Maximum On battery: 100%


So ... the only one not at 100% is the Minimum On battery. So, I guess I'll switch it to 100% and see what happens.




post #4 of 12
also check if your laptop has switchable video cards. it might be going to onboard intel HD3000 when not plugged in.
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post #5 of 12
Quote:
Originally Posted by traveler View Post
Thanks for the reply.

I looked there a few times for "CPU". Never saw "Processor". I see it now. Here are the current settings:

Minimum Plugged in: 100%
Maximum Plugged in: 100%

Minimum On battery: 5%
Maximum On battery: 100%


So ... the only one not at 100% is the Minimum On battery. So, I guess I'll switch it to 100% and see what happens.




Just be aware that forcing a 100% state will destroy whatever battery life that laptop has (not ruin the battery just the amount of time you're going to have on battery). You should also check to see if the laptop maker has a power control software installed as that can create conflicts. If you want an easy way to force CPU states then get ThrottleStop and use that. Also check that your power setting has the link state setting to disable so it doesn't slow down the GPU through a power saving attempt. Sometimes the High Performance profiles get screwed up and leave it on which leads to funky FPS.


Quote:
Originally Posted by venom55520 View Post
also check if your laptop has switchable video cards. it might be going to onboard intel HD3000 when not plugged in.
^And this.
     
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post #6 of 12
Thread Starter 
Quote:
Originally Posted by venom55520 View Post
also check if your laptop has switchable video cards. it might be going to onboard intel HD3000 when not plugged in.
Under Device Manager>Display Adapters ... only NVIDIA GeForce GTX 570M shows.

Is it safe to assume there is no switching?


post #7 of 12
Thread Starter 
Quote:
Originally Posted by traveler View Post
Thanks for the reply.

I looked there a few times for "CPU". Never saw "Processor". I see it now. Here are the current settings:

Minimum Plugged in: 100%
Maximum Plugged in: 100%

Minimum On battery: 5%
Maximum On battery: 100%


So ... the only one not at 100% is the Minimum On battery. So, I guess I'll switch it to 100% and see what happens.

I just tried. Did not work.

I fired up HomeFront. Same problem. A laggy jerky unplayable game. Then I plugged the power cord in and instantly the laggy unplayable condition dissappeared. Pulled the power cable back out and instantly the laggy jerky unplayable condition re-appeared. Same problem.

Same thing happens if I fire up Hard Reset.

But ... if I fire up HalfLife 2, there is no problem. There is no lag and no jerky rendering. All the way up to meeting Barny at least.

Just the two 2011 release games are a problem. Hmmmmmmm. Am I the only one having a problem running current games on battery power? (BTW Per the meter I estimate the battery to last maybe 20 minutes or so with HomeFront fired up ... but still it should play)


post #8 of 12
OP, you won't get max performance on battery with a high-end gaming laptop. http://pc.gamespy.com/articles/121/1210094p1.html , Ctrl-F to "plugged in" and read that little section.

Not much you can do to workaround, short of undervolting the GPU at stock speeds and limiting the CPU speed so it doesn't use any turbo. There might be some other tweaks but that laptop would pull >120W of power, so its not a good idea gaming on battery.

edit: so maybe just try 1366x768 on battery (assuming it plays at 1080p usually?).
Edited by jrbroad77 - 10/29/11 at 6:16pm
 
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post #9 of 12
Thread Starter 
Thanks jrbroad77 for your reply and the link to the review.

I'm looking for only that 5 minutes or so of battery life at full speed performance just to demo a top power hungry game set to maximum ultra. I am not looking to play the game. I only want that 5 to 10 minutes of peddle-to-the-metal top performance raw speed that this laptop is able and can do.

But where are the settings to manually make that happen?




post #10 of 12
Quote:
Originally Posted by traveler View Post
Thanks jrbroad77 for your reply and the link to the review.

I'm looking for only that 5 minutes or so of battery life at full speed performance just to demo a top power hungry game set to maximum ultra. I am not looking to play the game. I only want that 5 to 10 minutes of peddle-to-the-metal top performance raw speed that this laptop is able and can do.

But where are the settings to manually make that happen?

I really hope you didn't buy that laptop with such an assumption. Outright, I will say it is NOT possible without modding. It's just what it is. There are limitations on any given battery on power output. However, you can try to BIOS and/or VBIOS mod if you'd also like more performance on AC power. VBIOS will most likely be more helpful, can overvolt the GPU etc.

VBIOS modder: http://forum-en.msi.com/index.php?to...4892;topicseen and some ppl's results modding vbios http://www.mvktech.net/index.php?opt...id=13&id=61770

this is about all. best of luck, do more research(BIOS mods as well maybe?), read thoroughly. Lastly, you will break something if you don't read all the directions re: BIOS modding.
 
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