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PhantomRain
04-21-2014, 02:26 PM
I've got the JS, and the last couple days I noticed that when I'm encoding video (on A/C), CPU spikes to 79 or 80 Celsius almost instantly in a 23 Celsius room, then starts slowly climbing up to 90 before the laptop automatically shuts itself off. Fan is going at maximum during all this. Same happens during BOINC's initial install test of my CPU.

I guess I'm wondering if this is normal. It's a pain, as I have to pause the encode and wait for it to cool, then resume, etc. Shouldn't some internal firmware throttle the CPU to prevent this? I thought maybe I could force my GPU fan on (so the back right will be blowing too—no idea if it'd help), but my Nvidia control panel has nothing under tasks except 3D/Physx options.

sasuke256
04-21-2014, 03:38 PM
RMA, it shouldnt do that, it most likely have the thermal paste not well spread.. and you cant do it on your own without voiding the warranty..

JSRoger
05-17-2014, 06:34 PM
I don't know what BOINC is , but I'll tell you this , I do a lot video encodings and I use DVDFab for all of it and it does not pass 76C ( CPU ) and 50C gpu
try some other encoder .

dblkk
05-17-2014, 06:52 PM
When I use power director 12, on my js model, my gpu climbs as high at 100c. Most often its 90-100c while anything video related, gaming usually 85c ish. But mine never shuts off, I get throttling very seldomly. But my js just overall runs warmer than the jm I had before this. Boot, and then one google tab open is 5% processor load and 65c. My jm would boot and google tab open to maybe 50c. idle around 45c on jm, idle around 50-55c js.

hmscott
05-18-2014, 03:42 AM
I've got the JS, and the last couple days I noticed that when I'm encoding video (on A/C), CPU spikes to 79 or 80 Celsius almost instantly in a 23 Celsius room, then starts slowly climbing up to 90 before the laptop automatically shuts itself off. Fan is going at maximum during all this. Same happens during BOINC's initial install test of my CPU.

I guess I'm wondering if this is normal. It's a pain, as I have to pause the encode and wait for it to cool, then resume, etc. Shouldn't some internal firmware throttle the CPU to prevent this? I thought maybe I could force my GPU fan on (so the back right will be blowing too—no idea if it'd help), but my Nvidia control panel has nothing under tasks except 3D/Physx options.

PhantomRain, the new G750's use the Intel GPU build into the CPU, so they are tending to run hotter, but you shouldn't need to worry about the laptop shutting off, that isn't right. When you say shut off, do you mean actually power off? Or does the application crash?

The CPU should cool off enough on it's own without worrying about this, but you could try to force the application to use the Nvidia GPU - in the Nvidia Control panel set Prefer High Performance (Nvidia) globally and/or set it in the Program 3D settings, or right click on the desktop set it there.

Some apps like Movie Maker won't work on the Nvidia side of the Optimus configuration, so you might want to google "optimus app" for your "app" to see if anyone has tried to force it to use the Nvidia (High Performance) side of Optimus, and if it works.

Here is a brief Nvidia pdf describing the options:
http://developer.download.nvidia.com/devzone/devcenter/gamegraphics/files/OptimusRenderingPolicies.pdf

The best/newest/simplest/direct video I could find was this Samsung video, the first 1/2 of it is for Optimus / Nvidia, the last half is for AMD. The Nvidia side looks clear to me, if you find a better video let us know.
http://www.youtube.com/watch?v=duIm9Njn1qo

There are a lot of Optimus / Nvidia videos, here is a collection
http://www.youtube.com/channel/UCqDY4oi1Ov4HYsjsmsOVLzg

Some apps don't respect the Optimus settings above, but can be tweaked to use Nvidia rendering using the "Nvidia Inspector" app.

Here is a short video in English how to use Nvidia Inspector to set rendering for an application that isn't using the Nvidia Optimus settings from the control panel settings.
http://www.youtube.com/watch?v=c3RfquxeJdw

More Optimus Nvidia Inspector videos:
http://www.youtube.com/results?search_query=optimus+nvidia+inspector

Nvidia Inspector
http://www.guru3d.com/files_details/nvidia_inspector_download.html

This wasn't/isn't a problem on the G750JW/JX/JH as they only have the Nvidia GTX GPU enabled, there is no Optmus.

There have been a number of people with JS's overheating, and getting them replaced with a JS that runs much cooler, so it sounds like you are in that category - check with your seller to see if they have a new replacement you can come in and swap. Or return it and get one from another seller.

Even with a good JS, you probably want to get good at tuning which GPU runs on what app, to make sure you distribute the heat/cooling load across the 2 cooling systems, and get the best performance.

If you have an app that does heavy CPU computational work, and heavy GPU graphics too, it will probably be a good idea to take the time to make sure Optimus is splitting the GPU work off onto the Nvidia GPU, to move some of the heat load to the GPU cooling system - off of the CPU cooling system,

Let us know how it works out for you :)