Screen wave in Desktop while powering up, then in Chrome & iTunes (started with Finder not responding?) and flickering in Contacts
Are you sure this isn't a display issue? Plug in an external monitor. If you don't see the same "wave" and flickering on the external monitor, your built-in display may be flaking out. If you DO see the same weird display errors on the external monitor, then something else is wrong (perhaps an incompatibility, but something that is causing that much of a display mess is unlikely - possibly your video card is having issues).

If it is the internal display, sometimes very gently flexing the lid of your computer can temporarily fix this. Contact points between the display cable and the screen can become loose or break, causing weird display bugs like flickering or rolling lines. Wiggling the screen can put things back into contact - but this is not a permanent fix, you will eventually need to use an external display all the time or replace the laptop screen. (My old 2007 MBP started doing this a while ago - I was able to "wiggle" it into working again but do not trust that it will keep working much longer.)