Acer Extensa 5635ZG freezes after cpu upgrade.

Hi,
I upgraded my cpu form intel pentium T4300 to Core 2 Duo T9600 .After the upgrade my pc freezes randomly and most of the times when watching movies, watching videos in youtube or any other videos through the browser.
I tried to replace the RAM, to replace the HDD , but no luck.I have tested both the ram and hdd , no problems found.I used Linux Mint with a Usb stick,still the same problem.When i use my laptop for music or opening random files nothing happens,it runs pretty fast and no freezes.My laptop doesn`t overheat when this happens.
I cant find solution for the problem and its pain in the a** when you love watching a lot of movies.So i hope you can help me to solve the problem.

Excuse me for the bad english,but it isnt my native language.

 

Have you tried to increase voltage on the CPU? Do you tried to stress CPU by stress-tests, for example by AIDA64?

 

here it is http://img15.imageshack.us/img15/6499/hnlb.png

 

It is too high temperature for this processor. This is the link to the official Intel site. It is written there, that max TDP is 35W. By the way, which stepping of your processor is? Which thermal-paste have you used, when you swapped the processor? Can you tell me you method how did you attach the thermal-paste on the cpu?

First idea, that comes to my mind - it is overheating.

First of all, you can try to undervolt using RMClock utility. The second, use should use propper thermal-paste with propper method of applying it on CPU.

 

i put a grain of thermal paste and then the heatsink , without spreading myself the paste
Like this guy How to Remove and Apply Thermal Compound [Updated Tutorial] - YouTube
The termal paste i used is silicone one ,cheap one.I have used it before without any problems.Its not the best , but works for me.
My previous processor is 35W too.I think the temperatures are not so high,when i use the laptop temps dont go above 70 ,thats is when i`m watching HD movies.

I didn`t understand what do you mean "By the way, which stepping of your processor is?"

 

I cansay that this guy spreaded too much thermal paste even for desktop processor. In the case of mobile processor, you have to spread thermal-paste on the processor and make it as thiner as possible.

My previous processor has 35W too. And it heated very strongly, when I applied bad thermal paste at the first time. Now, my processor has 45W TDP, and with propper thermal paste and undervoltage it don`t heat up so strongly.

Each processor has its stepping - so called revision of it. Here is the link about it. You can see it in aida64(or everest) - service - cpuid. Or using CPU-Z program. The higher stepping is, the higher percentage, that some bugs in the processor are fixed. For example, there are two version of my processor - C0 and E0 steppings. C0 is older, E0 - newer. In E0 version are fixed some bugs and heating issues, for example. As a variant, there is a possiblity, that you have bought processor with not good stepping.