Older laptop,shutting down without overheating under gaming load.

[Dustojnikhummer]

Hello,about a year ago I got my hands on dead HP Probook 6550B.
Intel Core i5 450m 2/4.
ATI HD 540v (part of Mobility HD 4300 series)
4GB DDR3 1600 (1333 supported by CPU)
My problem is that this laptop keeps shutting down (without any error or BSOD) but only under gaming load. Yes,this is not a gaming laptop by any means but all I care about is Dirty Bomb (800x600 lowest but can go to 60FPS. It shuts down after about 5 minutes. But it is not overheating, I was monitoring temps with Afterburner and CPU never went over 75 degrees (I applied new thermal paste). Dirty Bomb,Minecraft,CS:S. Does not matter what game is it.
But it did not crash after 30 minutes of Unigine Heaven and Geekbench 4. Currently 8 minutes in Aida64 under CPU+GPU stress and still working.
Could it be GPU/motherboard dying? I would like this to replace my current Pavilion 15 n205sc.

 

[Reynod]

The gpu temps on the ATI card might be the problem ... check that first.
Next, update your graphics driver package.

 

[Dustojnikhummer]

Drivers are newest avaliable. Temps? Well,I dont know how to monitor them. No program seems to work (aferburner,hwmonitor,nothing). And it survived more than 30 minutes in Aida64

 

[Reynod]

HW Monitor should pickup the GPU temps ... down the bottom of the displayed window.

Post a screenshot (use snipping tool).

 

[Dustojnikhummer]

No,Hardware monitor does not pickup anything. But,now Im 100% sure it is AMDs driver issue within Windows 10. I installed Lubuntu and all games running on OpenGL and lastest MESA drivers works just fine.. But that does not help me. Official drivers are only avaliable for Windows 7 and I HATE Windows 7.