I haven't had the case off in a while so I'm about to take it off and go in with a can of compressed air. I imagine it looks pretty nasty in there since I smoke around the computer. I'll leave the case off and see if things work better.
At Best Buy's Geek Squad, they had 2 sets of pictures of a pc interior. The pc was loaded with, what looked like, from a long-haired dog. One picture showed a hand with a fist full of hair that was pulled out. All the opennings and fans were blocked and filled. The most amazing thing was the dead bug that lay at the bottom with its little feet up. Yet, I understand, the pc still worked.
Sorry Dark Trepie, I don't know enough to comment on your question. Just the the above quote brought those pictures to mind.