FH4 demo PC closing itslef

Hello. Game runs with very smooth fps, but crashes itself to Windows very often without error. I had similar problem with FH3, but it wasn’t so often. Any tips?

My pc:
I5 4690k@4,3ghz, MSI GTX970, 8gb ram, game instaled on SSD. All settings on High.

All I can think of is your GPU is a little too old. Crashes in FH3 stopped for me when I switched from GTX1060 to 1080.

check your ram usage.