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The Apollo KT400 is designed for Socket A motherboards and processors, such as AMD's Athlon and Duron chips. It supports DDR (double data rate) 200/266/333 SDRAM (synchronous dynamic RAM), and is aimed at users who require high performance, such as video editors. DDR333 memory delivers 2.7Gbytes per second of memory bandwidth through Via's memory controller.
The south bridge of the chipset has support for six USB (universal serial bus) 2.0 ports, and ATA-133, which is a fast way to move data from the chipset to the hard drive.