Both AMD's FX and X2 line are dual-core. AMD has been the undisputed champion of dual-cores for the last two years. The X2/FX are technically superior to the unimpressive Pentium D.
As a rough comparison:
The Core 2 Duo E6300 is as fast as the Athlon X2 4200+, and $20 more expensive.
The Core 2 Duo E6400 is as fast as the Athlon X2 5000+, and $90 cheaper.
The Core 2 Duo E6600 is generally
faster than AMD's fastest processor, Athlon FX-62, and it is
$480 cheaper.
QUOTE(boopme)
The real bonus right now in the 60% reduction in the price of P4 chips to clear inventory... A $550 P4 chip can now be had for$ 220

What would you what those old, obsolete things for, some fancy bling for the christmas tree?