A few months ago I installed a new Harddrive (just has WoW and steam installed on it. But, it isn't really screwed in, just sitting at the bottom of my case) and a new Videocard (GTX 460) as an upgrade for my PC.
Now, a few weeks ago I started noticing every now and then my monitor would flicker off, like it was losing its signal from the PC (not actually going off, just losing the signal). I only ever noticed it when I was playing wow, but it didn't seem like much of a problem because it happened just every once in a blue moon. But today, it seemed to really go crazy. While I was playing WoW, it was almost like my screen was having some kind of seizure. It was flickering on it off and sometimes going white. Textures in wow started really getting screwed up and tearing, and my UI just all of the sudden seemed all screwed up. I could see like multiple actions bars and it was tilted and such. I don't know how else to describe it, but I can tell that it was probably a problem with my computer and not wow. After a couple minutes, it went back to normal and I got DCed from Wow. A few seconds before it happened, I heard a weird beep from my computer and started noticing some video lag.
Does anyone have any clue what this could be? It was just so strange to me and like nothing I had experienced before. I know it could be a problem with my video card, but I haven't noticed anything like this outside of WoW. Could it be my new hard drive is failing? I just restarted my computer and will see if anything like it happens again so I can give better details.