Gigabyte NVIDIA GTX 550 TI

I am having trouble with my graphics card and I have no idea what is causing this issue. I am getting green pixels all over my screen pretty much anywhere that should be a dark color. This only happens on DVI port 1 but not on DVI 2. Any idea what the problem is? Is it probably a bad socket on the card? I've had it for almost 8 months and never used DVI1 until now because I never had two monitors available until now. Is there anything I can do to fix it? I have updated drivers, heat and power is not an issue because as I said, DVI2 works perfectly.