no other programs in the background
i am in the process of trying older video drivers and it hasnt helped so far
What I dont understand is why the game runs great for a few minutes then just goes to hell all of the sudden.
Only info I can add at this time is that when the game is running well the CPU is around 30-45% usage and when the game becomes choppy the CPU usage jumps to 60+%.
There might be something running on background. Check the task manager again and sort it by cpu usage. Single core chips like yours take huge toll when gaming while running background apps.
Looks like CPU and GPU temps climb to around 60C
Quite hot there. Try to reinstall the hsf.