I happen to have the same Notbook and the same problem. First off, any CPU related tools won't work as far as i get it, since the notebook is equipped with a desktop CPU that doesn't support any frequency changes. What I found out myself while disassembling the latop is that the "cooling paste" (dunno if it's the right word) for my CPU just had gone. I cleaned the cpu so far and it got a little better, but since the cooling is poorly made from what I see, without the paste the cooling cannot be too efficient as the copper cooler doesn't really touches the CPU itself as the design is clearly made for use of cooling paste. I'm currently waiting for my order of paste to see if I can fix my "broken" laptop again. One thing i found out is that nice dmesg output I get:
[4300673.251000] CPU0: Temperature above threshold
[4300673.251000] CPU1: Temperature above threshold
[4300673.251000] CPU1: Running in modulated clock mode
[4300673.251000] CPU0: Running in modulated clock mode
[4300678.256000] CPU1: Temperature above threshold
[4300678.256000] CPU0: Temperature above threshold
[4300678.256000] CPU0: Running in modulated clock mode
[4300678.256000] CPU1: Running in modulated clock mode
[4300707.982000] CPU1: Temperature above threshold
[4300707.982000] CPU0: Temperature above threshold
[4300707.982000] CPU0: Running in modulated clock mode
[4300707.982000] CPU1: Running in modulated clock mode
[4300728.207000] CPU0: Temperature above threshold
[4300728.207000] CPU1: Temperature above threshold
[4300728.207000] CPU1: Running in modulated clock mode
[4300728.207000] CPU0: Running in modulated clock mode
[4300858.305000] CPU1: Temperature above threshold
[4300858.305000] CPU0: Temperature above threshold
[4300858.305000] CPU0: Running in modulated clock mode
[4300858.305000] CPU1: Running in modulated clock mode
Where you can see clearly (when working with the latop you also notice the fan increasing like hell) when the point of overheating is reached. Usually my system works well then given I use programs that don't intensivly need the cpu like text processing, etc. But if I try games with more intense graphics or start a compilation of a program with gcc for example it doesn't take until i get freezes with a following shutdown and the impossibility to boot up the laptop until he got a decent amount of time for cooling down and/or I get error messages mostly from kswap telling me that several CPU registers are not the way they are supposed to do, thus causing a crash which mostly can be fixed, but I get advised to reboot anyways, which in turn results in a several minute lockdown of the whole system (usually I need to wait for about 15mins until I can boot up the PC again).
I am no expert at all when it comes to that level of hardware and linux, even if I maybe have some above-the-average knowledge, so all of the above is just my reasoning to find the cause for the error and may be wrong at all, which I actually don't hope