Asus U36SD laptop does not throttle

Does asus laptop throttle when components reach around 90 degrees?
My laptop just shuts down instead of throttling the processor. Is this normal?

 

How often do you clean its vent?

 

Its a new laptop. The problem is that the laptop does not throttle down the processor and continues to "turbo boost" until laptop automatically shuts down.

 

Unless i'm mistaken, the CPU should take care of Turbo Boost on it's own without intervention from the notebook. That said, regardless of turbo boost, the CPU should throttle when it gets hot. However it shouldn't get that hot regardless of the cooling in the laptop, i'd return it or ask Asus for a RMA, getting temps that high on a brand new notebook simply isn't normal. What were the temps on the GT520 by the way? Thermal shutdown usually occurs because of the GPU.

 

Might want to RMA like what tijo said, the BD PROCHOT on your i5 isn't working properly, could it be it was turned off even before you bought it? You can try using the software ThrottleStop wrote by unclewebb and enable the option BD PROCHOT if it really was turned off, worth a try. He wrote a guide here: The ThrottleStop Guide

 

Without overclocking GPU, the temps are fine. When I overclock the GPU by around 35%, the temp are really high when GPU is fully loaded + cpu fully loaded + turboboosted, the laptop overheats.

Without turbo boost, with GPU overclocked 35% and all fully loaded, the temp is around 75-80 degrees which is alright temperature considering the thin profile of the laptop. Right now, I already use Throttlestop to stop it from turboboosting. The BD PROCHOT setting is enabled everytime I start the program. But the cpu just doesn't want to stop turboboosting by itself when there's no thermal headroom.

The problem might be due to how the laptop is designed. The laptop shuts off at 90 degrees (thermal limit of the GPU). However, processor does not throttle maybe until 100 degrees (TJmax 100C).

 

thats crazy. How much of a performance gain are you getting with the OC on the 520m

 

When you are overclocking and fully loading a CPU or GPU, the temperature that they can start to randomly reboot decreases.

On the other hand, a manufacturer might have decided to set a GPU trigger temperature of 90C that forces a laptop to reboot automatically whenever it reaches that temperature. There is not much you can do about this other than try to mod the bios which if possible can be risky. Other than that, the only thing you can do is make sure that your GPU never hits 90C.

You can use ThrottleStop to help with this issue. If disabling CPU turbo boost helps to prevent your GPU from going nuclear then why not set up two profiles in ThrottleStop and have ThrottleStop automatically switch profiles on the fly. Profile 1 would have full turbo boost and profile 2 could reduce the amount of turbo boost or totally disable it depending on what CPU you have.

Go into the Options window and set a GPU alarm temperature of about 80C to 85C and tell ThrottleStop to switch to Profile 2 when the GPU gets up to this temperature. You will have to play around with what temperature works best for you and how much to slow your CPU down in Profile 2 but this feature can be used to run your CPU as fast as possible without the GPU going over its limit. As soon as the GPU gets back under your Alarm trigger temperature, your CPU will automatically switch back to Profile 1 and run at full speed. Your CPU and GPU can then take care of themselves while you continue to game as fast as your laptop's cooling system allows.

 

I just looked inside the bios for U36SD downloaded from Asus site, somewhere in your laptop might have already reached 100C. The default temp on the Critical trip point is set to POR (Plan of record = 100C). Possible to mod and flash it but it is not a good idea risking the chance of bricking your laptop. Another thing, you have probably OC'd your GPU too high and caused it to draw more power through the motherboard and result in sudden shutdown, probably best to keep your clocks lower than that.



The max possible Critical trip point can go up to 127C but this is suicidal.

 

Where did you download v4.5? I can only get a hold on v3.13 or BCP V8

 

Go to this thread

 

Do you have experience in modifying the BIOS?
I want to change these values:
active trip Point 1 55 degrees -> 63 degrees
active trip point 1 fan speed 75%->50%
passive trip point 95 degrees -> 87 degrees (tell processor to throttle at earlier time)

These changes not only will make the machine silent, but probably solves the overheating problem.

 

Modifying them is fairly easy, just select the values you want and save the BIOS then flash, but remember not to touch the fail safe settings, in case anything goes wrong. I believe the U36SD only comes with a single fan, the BIOS I have modified before was for G73JW which has 2 fans, so my experience might differ when it comes to U36SD BIOS modification since the options in the G73JW were slightly different. Having looked through the available options in the U36SD, I supposed it will work. Does your laptop's fan spin before reaching 55C? If not, this modification means you won't have the fan spinning before it reaches 63C. Might want to do some tests after flashed, see if your temp will hit 71C (100% fan speed) with the 50% fan speed from the 63C trip point. If it doesn't, this modification is on the right track.

Do this at your own risk!! Flashing BIOS always comes with a chance of bricking!!

Another thing, I think the passive trip point is only activated when you select passive cooling method in the power option.

 

I think laptop reboots not because of CPU but because of NVidia GPU overheating. I disabled my NVidia GPU in Windows Device manager and laptop does not reboot anymore though I am left with Intel GPU only active. This solution might be good for someone who does not need 3D capabilities of NVidia that much.