I've had the GeForce 4 titanium 4600 for less than a month and problems appear to have arisen. The pessimist in me fears that the card is faulty. Hopefully I'm wrong but 2nd opinions on this will be a big help.
All of a sudden, 1080i no longer appears to display correctly - no matter how many times I reboot, re-select the resolution or change the refresh rate from 50hz to 60hz, or vice-versa. Here's a shot and what you see is exactly how it looks to me.
Even at 720p, there are still problems, including the corruption of text - or the failure to display the text in its entirety even when refreshed or re-arranged.
Videos that previously played without issue now suffer from moments where a black horizontal line appears (sometimes several lines) and the image appears to scramble for a few seconds and the output flashes to black. This only occurs in full-screen and switching media player makes no difference, neither has booting from a different OS X partition.
Here's a short clip of the problem that I filmed using my phone. Please excuse the clumsy camerawork but I did manage to capture the flashing.
In attempt to troubleshoot, I reinstalled the stock MX card let a 2hr film play in full-screen mode with a different monitor and none of these issues occurred so that gives the Quicksilver's logic board the all clear and points towards the 4600 as the culprit. I doubt that the Panasonic TV is at fault because I've tested it with other Macs and PCs via DVI to HDMI and the same tasks and resolution/refresh rate and they're fine. I've also swapped the DVI to HDMI cables with no change regarding the 4600.
I suspect that its DVI signal is failing because when I reinstalled the 4600 and connected it to the other monitor via VGA, using a DVI to VGA adapter, the problems didn't occur. What say you, my fellow MR members?