ok...bought n installed new Palit GTS 250 512mb but it gives problem each time i start my comp.
The screen has some extreme noise with burning sensation (couldnt find any other words) as below:

there you can see curves all over....which keep on moving with noise giving it a smooth trailing effect.
this happens for abt 2 mins evrytime i start my pc.
After removing onboard gpu drivers, I did clean install of the drivers tht came with the card n also of the latest ones i.e.190.62, but in vain.
I removed all the gts250 drivers n enabled onboard gpu (gma3100) of dg33fb mobo, it works fine n doesnt have tht noise problem.
-help.
edit: by "noise" i mean video noise and not sound.
The screen has some extreme noise with burning sensation (couldnt find any other words) as below:

there you can see curves all over....which keep on moving with noise giving it a smooth trailing effect.
this happens for abt 2 mins evrytime i start my pc.
After removing onboard gpu drivers, I did clean install of the drivers tht came with the card n also of the latest ones i.e.190.62, but in vain.
I removed all the gts250 drivers n enabled onboard gpu (gma3100) of dg33fb mobo, it works fine n doesnt have tht noise problem.
-help.
edit: by "noise" i mean video noise and not sound.