My 690 outputs a pixelated image when set to high res. HELP!

Whenever I set my resolution to 1080p or higher my image becomes pixelated it is especially noticeable on text.
I've tried:
-resetting the power cord
-reinstalling the driver
-different dvi cords and connecting different ports
-Changing the refresh rate between 59 and 60 hz

I've spent the last 2-3 weeks setting up this watercooling loop and now I can't even test it out...... It's driving me crazy!
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More about outputs pixelated image high help
  1. I've solved the issue. It turns out I needed a dual link DVI cord. This thread can be closed or deleted if that is possible.
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