Water boils at 100C at sea level with 1.00 atmosphere (pressure). I live at 4500 feet where the boiling point of water is about 95C. If you live at higher elevations, be careful or add a solute to raise the boiling point above that of H2O only.
People are commenting about the dumbest things. If you are looking forward to a decent performance boost, water cooling is a great solution, it transfers the heat away a lot more efficiently than air, PREVENTing the chip from overheating. It also raises the thermal ceiling and reduces noise output (in most cases).
The chip should be destroyed way before the water reaches 95 degrees, since the voltage needed to heat that much water would be insane.
If you would think about it, using your brain, we humans are around 80% water, and we don't simply explode even if we are cooked...
Anyone interested in buying a couple 6950s, one with a wateblock on it? I need help to finance a new 290X with one of these water blocks strapped on. They've done good this year... AMD and EKWB done good.