HX can cache up to 512MB. I'm a dinosaur, and that's what I'm sticking
with, using the new 0.25 micron AMD K6 CPUs. Check out:
http://www.anandtech.com/chipset.html
To get the 512MB cache limit, you need to add a simple tag SRAM
chip to the board, usually.
Clemmitt Sigler
Va. Tech Physics Dept.