For example, if I play videos on YouTube that are in HD (720p or 1080p) it doesn't look HD, or if I play movies that I've downloaded that are 720p or 1080p they don't look HD, but only when the resolution is set to 1080p... when I set it to 1080i or 720p they look HD.
My monitor is 22" so I think the original resolution is 1680 x 1050 but since I bought the graphics card and downloaded the driver I'm able to switch the resolution to 1920 x 1080.
When the resolution was set to 1080i, at first, I got black borders on the top and bottom. I managed to adjust the resolution with Catalyst Control Center to remove the black borders, the resolution was lowered from 1920 x 1080i to 1728 x 1028i; however, the picture still looks HD, I can tell the difference in how the picture looks when playing 720p & 1080p movies.
When the resolution was set to 1080p, at first, the screen had black borders about 2 inches thick on the top, bottom, and on the sides of the screen, I had to upscale the screen size with Catalyst Control Center in order to remove the black borders. So, I managed to get the screen size to fit my monitor without having any black borders, but it still doesn't look HD. 720p & 1080p movies look exactly the same as they did when the resolution was 1680 x 1050.
I'm not sure what HDCP is but I'll look into it. How can I find out if my monitor supports HDCP?