I just finished building a new computer and installed Mint Xfce 13 on it. I got it installed and booting up, but I'm having a problem with the display. Attached is a pic of the screen. This is how it looked before I got a video driver installed. I used the driver that the OS recommended. After installing the driver it worked great for about 10 secs and then it started with something similar to what's shown in the pic, except instead of little horizontal lines, it's now different colored, small boxes. The computer will start freezing and unfreezing for various amounts of time (like 20-30 secs of frozen then 20-30 secs unfrozen) and then eventually lock up tight to where I have to do a hard boot with the power button. The video card I have is a NVidia GeForce GT 500.
My questions is do you all think this is a software problem or could it be a faulty card. I think it's a software problem, but I'm not sure what to do since it locks up so bad I can't really do anything. Also wondering if I should try a different distro.
Computer screen pic