PC shutting down unexpectedly - Optimus IV

I have a gaming notebook and am used to play games like Far Cry 3, Battlefield 3, Crysis 3, etc with no problems. The notebook is around 6 months old and specs are at the end of the post. The PC shutdown completely without any warning while playing Wargame: Airland Battle 5 times this week, one of them today. Facts:


- After the first time I thought it could be due to overheating, so I used GPU-Z to create a log of my GTX 660M. The highest temperature was 78C but the game continued to run smoothly without ANY artifacts, bugs, stuttering, etc. As it was a particularly hot day and I was using a desk with poor ventilation at the beginning, I changed my position and the temp dropped to 72C (Far Cry 3 and Crysis 3 both used to give me around 74C with high settings), and then to 69C. Notebook shut down unexpectedly while on 69 degrees, shown by GPU-Z log.

- I then proceeded to update my GPU driver, do a complete virus scan on the PC and even used Ccleaner in an attempt to fix any issue.

- I then, as a test, played the entire 2nd mission of Battlefield 3 campaign with medium-high settings without any problems. Max temp was 69C, the same temp at which the computer turned off previously.

- I went to auto-adjust W:AB video settings with the built-in feature and lowered a couple things from high to mid. Tried playing a skirmish game and the PC turned off again, at 68C.

The facts above made me think the problem is not a overheating issue (as higher temperatures were achieved before and never triggered any abnormal behaviour on the GPU/PC and never made the PC turn off) and also not a problem with demanding too much from the PC (as BF3 worked flawlessly and I am used to play demanding games without problems). I'd like to know what you guys think about it.

Also, what is the temperature my GPU should be getting while gaming? I usually get from 60-74C on demanding games, and I noticed that the PC has 2 vents, 1 at the back and 1 at the bottom: if I lift the PC from the desk, leaving the bottom vent free, the temperature goes down by a good 8-10C. Is this supposed to happen? Now I wan to buy some kind of support for it, but I don't think this should be happening anyway.


Any help is greatly appreciated!


Specs:

15.6'' Optimus IV Notebook
Processor: Intel i7-3630QM 2.40GHz
RAM: 12GB Samsung 1600MHz SODIMM DDR3
GPU: NVIDIA GeForce GTX 660M 2.0GB DDR5
Thermal Paste: Artic MX-4 Extreme
HD: 500GB (only 33% used)
 

Pagey

Bright Spark
You could always see if there is a big dust build up on the fins.

I've had mine since November and I've not come across any shutdown issues and I'm not terribly sure if it's an over heating issue.

Wait, just had a thought: Can't you check your computer logs to see what the issue is? It should hopefully tell you what was happening when it shut down.
 

Pagey

Bright Spark
Actually rickne, I do blast mine out on a regular basis, so I don't get many overheating issues. ;)
 
I have tried, but it looks clean. Also, the temperature doesn't seem overly high to me...

anyway, I will try again!

any other ideas?
 
The laptop was bought in the end of November 2012, so I'd say it is around 6 months old

Yesterday i used intel processor diagnostics tool and performed a test on the processor, and everything passed normally.
 

ubuysa

The BSOD Doctor
I agree with Pagey, have a look in the Windows Event Log (Control Panel, Administrative Tools, Event Viewer). It will take a while to load all the logs, then click on Event Viewer (Local) in the menu on the left and in the top of the three display areas see whether there are any Critical errors (there should be if it's shutting down). Expand that (click the + sign) and you should be able to see what is causing the problem.

It's worth knowing how to run the Event Viewer because if you end up contacting PCS they will probably want you to send them your event logs.
 
I agree with Pagey, have a look in the Windows Event Log (Control Panel, Administrative Tools, Event Viewer). It will take a while to load all the logs, then click on Event Viewer (Local) in the menu on the left and in the top of the three display areas see whether there are any Critical errors (there should be if it's shutting down). Expand that (click the + sign) and you should be able to see what is causing the problem.

It's worth knowing how to run the Event Viewer because if you end up contacting PCS they will probably want you to send them your event logs.

I have indeed used the Event Log, but I am unable to identify anything that could be the cause. The only errors I have found that correlate to the time of all events is the "Event 41, Kernel-Power", but it is fairly generic in my opinion: "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly."

EDIT: The event above is recorded after the pc rebooted, I have not found any errors or warnings happening before the shutdown.

Does this actually mean something?

EDIT: I have also used BlueScreen View and looked for memory dumps, but there are none to be found. It seems like the PC isn't crashing, just shutting down abruptly.
 
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ubuysa

The BSOD Doctor
I never take the battery off the PC, but as I'm playing games often the machine is always plugged to the mains... maybe a faulty AC adapter?

Do you have lights to show you when the battery is being charged?

Could you try modifying your power settings for the battery so that you get a Low Battery Notification much earlier (say at 20%). It might be worth setting your Critical Battery Action to Sleep or Hibernate as well (instead of Shutdown). That way if it suddenly sleeps or hibernates we'll know what caused it. If it still shuts down after you've made those changes it's probably not the battery.

Worth a try?
 
Do you have lights to show you when the battery is being charged?

Could you try modifying your power settings for the battery so that you get a Low Battery Notification much earlier (say at 20%). It might be worth setting your Critical Battery Action to Sleep or Hibernate as well (instead of Shutdown). That way if it suddenly sleeps or hibernates we'll know what caused it. If it still shuts down after you've made those changes it's probably not the battery.

Worth a try?

1. Yes, I have lights and it says the battery is currently totally charged now, but it displays an orange light while battery is charging.

2. Seemed a good idea, but I went to adjust these options and my settings are already to hibernate if PC is using battery power and it's running out, or do nothing if the PC is using the power outlet. I assume your idea is already implemented then?
 

ubuysa

The BSOD Doctor
1. Yes, I have lights and it says the battery is currently totally charged now, but it displays an orange light while battery is charging.

2. Seemed a good idea, but I went to adjust these options and my settings are already to hibernate if PC is using battery power and it's running out, or do nothing if the PC is using the power outlet. I assume your idea is already implemented then?

The lights sound ok, that's what I'd expect.

You might change the "On power" Critical Battery Action to hibernate just in case. It's beginning to not look like the battery though. Still it's almost as important to know what's not causing the problem as what is? :)

I would think it's now worth giving PCS a call and see what they suggest.
 
The lights sound ok, that's what I'd expect.

You might change the "On power" Critical Battery Action to hibernate just in case. It's beginning to not look like the battery though. Still it's almost as important to know what's not causing the problem as what is? :)

I would think it's now worth giving PCS a call and see what they suggest.

You're right, i will change it and exclude this possibility. Also, I have already sent a message to PC Specialist but apart from a reply asking how often it happened and my reply telling them all I told you, they didn't answer back for 2 days (including today).

That's why I posted the problem here.
 

ubuysa

The BSOD Doctor
You're right, i will change it and exclude this possibility. Also, I have already sent a message to PC Specialist but apart from a reply asking how often it happened and my reply telling them all I told you, they didn't answer back for 2 days (including today).

That's why I posted the problem here.

I think you'd be better advised to phone them.
 
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