When AMD introduces its 3200+ (2GHz) Athlon 64 on the 23rd September, it will charge around $399 for the single channel DDR 754 pin model. In October, it will introduce a 3400+ version of the chip. And its Athlon 64 FX, which is a 940 pin dual channel DDR chip, is expected to cost over $650, but will not use AMD's "PR" rating.
Meanwhile, the Athlon 64 FX with 939 pins will now launch at the end of the first quarter of next year, and we understand it won't now be compatible with the 940 pin version, meaning a motherboard change.
Source: The Inquirer.