well, I just happen to have a 2,4B, 2,4A, and 2,53. Long story, but anyway........
I have an Abit SR7-8X and Corsair PC2700 and at 1,6V:
P4 2,4A can get to 2.8, but the memory has to be turned down, so I would get better quality DDR400 or better. Also, this isn't a great overclocking chipset...