AACCK! What is up?

So, I just bought a new CPU motherboard and RAM (bundle). The computer worked! Yay, I can play FlatOut! Then like 3 days ago, these wierd display curroptions appeared. My hard disk is old and kind of finicky, so I bought a new one, in hopes of remedieing the problem. I formatted it, installed XP on it, :d: but when I started it up, same prob! I think it might be a bad connection or IDE cable, but help would be welcome!