New
#121
Solved
I had solved the VERTICAL LINES issue by lowering the memory frequency. I'm at 800 now and my computer is perfectly stable for two days now in any game. The GPU is at default speed of 850 Mhz. I'll go up with the memories until I'll find the max stable clock.
I had use ati systray tool for the downclocking. So it seems it's a hardware issue, I'm doing a few more tests in the coming days to be sure and change the card after.
I have the gigabyte's hd 5770 with the original cooling part.