In this ad for a fan and heatsink it says Athlon XP 3400+;
"A brand new Rosewill Hyper Silence CPU Cooler (RCX-Z100R) for the AMD Socket-A, aka 462, Athlon XP up to 3400+. This is the best Socket-A CPU cooler around. It's been discontinued, so if you need one for your legacy Socket-A system...