Whats causing this vertical sync problem

[aerialace]

ok so i have an ati 4850 512mb that runs at about 80 degrees on average.

now i have a vertical rate problem, theres slight screen tearing/refresh rate issue even when a gaming isnt running.

i use a dvi to vga converter with my card since i dont have the right dvi cable to connect it .Could this be the issue?

thanks for some help

this is how it looks like in-game:
http://www.youtube.com/watch?v=DQBqBbpfugI

that refresh rate tearing happens even outside game.
Refresh rate is 60 in Display Settings (Windows7)

i tried force vsync in ccc, doesnt help

Monitor:ASUS VH236H Black 23" 2ms Full HD Widescreen LCD Monitor
resoltuion: 1920x1080

 

[renz496]

have you tried different cable? btw i can only see your monitor flickering (maybe due to cam that being used) and not tearing from the video you post

 

[Totempole]

It looks like some kind of interference with the card. What speed is the fan set to? Permanently setting your GPU fan to 100% is murder for that card. Make sure it's set to "Automatic".

I had a 4870 a while ago, it always felt like such an unstable card. Eventually traded it for a GTX260 216. I don't regret my decision for a second.

 

[renz496]

It looks like some kind of interference with the card. What speed is the fan set to? Permanently setting your GPU fan to 100% is murder for that card. Make sure it's set to "Automatic".

the card most likely fine but the fan lifespan will be short for sure. the problem with automatic fan control is the card will only ramp up the speed when the gpu core was already too hot. that's why it is better to use something like MSI Afterburner because you can set the fan curve in relation to gpu temperature

 

[dhicks19]

i would rather up the fan speed and have the fan die at least the fan could get replaced for pennies. Had mine running at %100 for a year no probs