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carulli
03-04-2012, 08:49 AM
A while back I put a 920xm in my G73JH and is is currently at 93w. While running something like prime 95 I get up to 150W power consumption (according to throttlestop's battery meter). I get approximately 145W power consumption while running msi kombustor. I get about 60W consumption on idle. Now when I run something like prime 95 AND msi kombustor, on battery my g73 will shut shut off abruptly, the same when im using my power brick.

My question is, is this because of:

a) the battery and the power supply (rated for 150W max) have a power overload cut off,
or,
b) the mobo is getting overloaded,
or,
c) something i haven't considered.

Extra notes: When I did use my power supply it wouldn't turn on for a while (not the pc but the power supply itself). Because of this I am reluctant to try it again for fear of destroying it. Also, this has NEVER happened in any game I have played, probably the most demanding on both the processor and graphics card would be Skyrim and it does that for hour with no issues.

Thanks for your time, Daniel.

unclewebb
03-04-2012, 06:06 PM
It's not a good idea to run Prime95 or MSI Kombustor while on battery power let alone both at the same time. You can damage or shorten the working life of a battery if you try to draw too much power out of it, too quickly. Many laptops use CPU or GPU throttling or both when on battery power to prevent the battery from being damaged.

All power adapters have a safety feature built in so that if you try to draw too many watts, they will shut down. When this happens you usually have to power cycle your adapter by unplugging it and plugging it back in. You might have to do this several times or you might have to wait until it cools down. And yes, you can damage a power supply by overloading it like this.

Many manufacturers decided that the majority of their customers would not be interested in hauling around a huge power brick so they cut a few corners. The power adapters shipped are barely adequate to fully power a modern laptop with a high performance CPU and GPU and the batteries are not even close to adequate.

carulli
03-04-2012, 11:29 PM
I am not going to run it off batteries like that for long, it was only this once for a power draw test. I know what happens when you pull too much current through a lithium ion battery. Was my power off due to the mother board overloading or the power adapter/battery overloading (it did need a cycle like you said)?

xeromist
03-05-2012, 05:40 PM
carulli,

If it needed a cycle then it's the brick, not the mobo. The mobo shutting down wouldn't have caused the brick to overheat.

carulli
03-05-2012, 09:53 PM
But why would the computer instantly shut down if it was just the brick. Does this happen?

xeromist
03-05-2012, 10:17 PM
But why would the computer instantly shut down if it was just the brick. Does this happen?

Yes, because the brick will cut power if you draw too much. The alternative is fire so it's doing its job.

carulli
03-06-2012, 03:31 AM
As an example it could just pull the brick out of the laptop and it would flawlessly jump to battery power. Why did this not happen in this instance?

xeromist
03-06-2012, 05:18 PM
I suspect that the draw was also too much for the battery. I don't know that for sure but the battery can't provide a much as the brick so it would make sense.

Also, not sure about the inner workings but the power cut in the brick may be different than simply unplugging. It might occur in such a way that the laptop either intentionally or unintentionally shuts down as well.

carulli
03-07-2012, 12:16 AM
Ok, thanks for your replys :D. I have ordered a Targus 180W Power supply so this should fix the problem.