Battlefield 3 crashing my PC

Aredio

Reputable
Jan 17, 2015
13
0
4,510
Hello !
Recentrly started to play Bf3 , but sometimes after like more than 15 my pc completly crashes and i have to restart my whole PC !
my gpu is : radeon hd 4870 Sapphire .
what should i do and feel free to ask for any info
 

Aredio

Reputable
Jan 17, 2015
13
0
4,510
no im not never did , the core clock on my gpu is 750 wich is the stock one
i lowerd my resolution and increased my fan speed
and whats more weird is that this only happends to Online gaming not campaign or Co-Op