Yet again, the Athlon XP sits at the same height as the Tbird. I personally would get a better heatsink and fan than a Orb3.
LOL sad, you must have really good eyes to be able to tell the microns difference in height, if there is one, which is more likely a manuf issue rather than design.
The XP is the same dimension as the MP and the Tbird. People have no problem using heatsinks with either. If things were different between the two chipsets, do you think that maybe in all their infinite wisdom, one of the heatsink companies would have released a heatsink by now? It's the same, the bridges on top of the chip aren't the same, but the rest of the dimensions are fine.