Fan almost never stops humming after repasting cpu

My sager np9170 was getting kind of loud with fan noise, so I repasted it with arctic mx4. After repasting, the temperatures are markedly better, and under stress tests, it used to be that my machine goes over the limit temperature of 85 in 30 secs, but after repasting it stays around 80. However, even with the good temperature, the fan doesn't stop running when idle, when the CPU usage is around 5%. It used to at least be quiet with no load. I'm not sure what's going on here.

My CPU is i7 3610m. I only repasted the CPU, and the only fan that's spinning nonstop is the CPU.

 

Try pressing FN + 1 on your keyboard to force them to go from Full Blast to Automatic

 

didn't do anything for me. The fan is not full blast either. It's probably at the lowest setting, but it just won't turn off.

 

can you tell me which nVIDIA Driver you are using? some of them cause the GPU to run at max clocks even in 2D Mode which may cause the fans to never stop spinning. It gets very annoying

 

it's not a problem of the gpu. It's only the CPU fan running. GPU is at 0% the whole time.

 

This happened to me the last time I installed XTU, I thought XTU was the issue but @jaybee83 told me that there would be a new overclock fan setting after installing XTU that I need to make sure is not selected when doing normal day to day tasks, make sure your control center settings look like this:

 

Well I actually have a amd 7970m, so it can't be exactly as you say.

 

So I just repasted again. Whereas last time I used the credit card method to spread a thin layer on my i7 3610m, this time I did the line in the middle method. Still having the fan problem though. Temperature looks the same.

 

What is your idle temp before and after repasting?

 

So after a while with the screen off, the fan actually stops. I turned on the screen and observed that the temperature, with the temperature is something like 34C for core 0 and around 38-42 for the other 3 cores. The temperature slowly rises until core 0 is around 44C and the others around 50C before the fan turns back on. After that the temp drops to around 36C for core 0 and 40-44C for the other cores, with the fan on and system idle. After that the fan never shuts off.

Before pasting, the idle temp is around 49 for core 0 and 51-55 for the other cores, which is higher than the temperature at which the fan turns back on now.

I failed to mention in the original post that my heatsink came with the little copper cubes (like in this picture, which I took some time ago). The cubes lost their adhesion and flew everywhere inside the machine, so I cleaned them out and glued them onto the heatsink with arctic alumina thermal adhesive. It seemed to me at the time that it couldn't make things worse, could it?

 

Now my GPU fan is blowing nonstop even though the GPU is at 0% utilization.

There were 2 copper cubes (among 8 total) loose on the GPU heatsink so I glued it back on with arctic alumina adhesive. Could that be a reason?

But still, the GPU is not even running, how could it hot enough to trigger the fan?

I put my hand in front of the GPU heatsink vent, and the air coming out is cool as cucumber. There is really no reason for the fan to be blowing.

 

That's not necessarily a good thing, that could mean that hot air is trapped inside.

 

This is to be expected. The difference between a perfect TIM application and one that is merely average is 1-3C at most. Really, check the link in my sig. It makes almost no difference for the average user (unless you do a really, really bad job applying it).

 

That link in your sig is worth checking out for anybody looking to find out more about applying thermal paste, if you haven't done it before.