I wouldn't really worry about temps too much. You will probably just find that you reach a limit where the system won't boot, or it won't load Windows. It depends what is holding the system back, and there is a bit of an art to choosing the compromise that will give you the best overclock - For example it might be better to put a divider on the RAM to allow the FSB speeds to go higher, but then you cut memory bandwidth and you get worse performance in some tasks. I wouldn't bother with any of those Windows-based overclocking tools (except for graphics), just do it in the BIOS. Check that it's 100% stable (Use Prime95 torture test) and you're away. But like people have said, read up on it. The easiest thing to overclock first is the graphics. Use a program such as RivaTuner and see you much you can get out of the card without it artefacting. Have fun, you should be able to get a decent overclock because you've got all good stuff (apart from that powersupply)