When it comes to quad-core chips, good things come to those who wait, Advanced Micro Devices believes. After years breathing AMD's dust, Intel beat its rival to the punch by releasing its quad-core Xeon 5300 "Clovertown" processor for servers in November. But AMD's "Barcelona" quad-core chip, due to arrive midway through 2007, will be a significant notch faster than the Clovertown chips expected to be on the market at that time, said Randy Allen, AMD's corporate vice president for server and workstation products.