Would a video card cause this

[Mike2007x86]

Problem: Monitor flickers like crazy for 10-15 minutes when the pc is first turned on. Anytime the monitor shutdown for a second the seuqnce is restarted and flicker returns.

Steps taken:
New DVI Cable added

Additional Details
Samsung 226BW C-Panel 1680x1050 16:10 2ms gaming monitor
E-VGA GTX 260 216 w/ 285.79 Beta WHQL
Visio 47" HDTV HDMI Out on DVI port 2 (steaming movies to big screen)

The flicker rate is different for each mode of the monitor
Custom,Internet, Game, Sports, Movies, Dynamic Contrast - Extremely Fast Flicker
Text - Slower Flicker

I hate to have to buy a new monitor or video card as money is real tight right now, but I would love to fix this. The flicker is constant for some reason and it seems like each day the flicker takes longer and longer before the screen is useful.

This is the way the bootup sequence works:
I start the computer and turn on the monitor - The flicker is constant so I walk away
Come back cycle thru all of the modes atleast once.
Repeat 3x more at 5 minute intervals (flicker seems like its never gonna stop)
Just when your ready to give up and shut down the computer, cycle to text mode.
The flicker rate will slow down and the flicker will eventually stop.
Wait five more minutes once text mode is functioning properly then switch over to game mode for more vibrant colors.

It takes between 10-15 minutes before I can even use the computer without getting the worst headaches. The time until the pc is useful seems to be increasing daily for some reason. I'm wondering if its drivers, video card, or the os being windows 7 64-bit with a 226bw. This never used to happen until about 2-3 months ago. I have been dealing with this issue for a few months time, but help would be appreciated.

Sometimes when I first turn on the monitor I have nothing, but a grey sceen. Then once I shut it off and turn it back on the desktop shows, but the flicker is there.

 

[Galaxy]

I've had a problem like this with a Westinghouse 1080p TV. I could connect any PC to the TV's DVI port and it would flicker like crazy with artifacts on the screen, but only for about 1 minute, not 10-15 like you're having.

What I eventually did was connect the PC to theTV's HDMI port with a DVI to HDMI cable, and for whatever reason the problem didn't exist on that port. You might try hooking it up with alternative connections to see if that fixes it. You might try VGA if all else fails.