OCing a Thunderbird is just a waste of time. Thunderbirds are quite possibly the hottest-running processors aside from the Pentium D. There's also very little overclocking potential at all. It would be much cheaper to simply buy an Athlon XP processor and throw it in that board, and it would run a hell of a lot faster than an overclocked Thunderbird. The waterblock alone will cost you more than a new CPU. The same goes with the video card. Just buy a cheap Athlon XP and a better video card on Ebay and save yourself the trouble.