Samsung LCD tv - PC HDMI connection issues?

Basically, I recently installed a new GPU for my pc, but since then, when I plug my HDMI cable from pc to monitor in the HDMI-1/DVI slot on the TV, the resolution on my PC is low & If I try to change it the screen gets a yellow tint and does not fit, whereas if I plug it into the HDMI-2 slot on my TV, the resolution is fine with no issues, what is causing the problem for the HDMI-1/DVI slot?
 
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