In order to offer significant improvement for systems requiring higher bandwidth, DDR SDRAMs incorporated significant improvements over PC100 and PC133 SDRAMs including dual edge clocking (a.k.a.

Supports up to 2GB of DDR RAM. For Pentium 4 ... Uses hub architecture like the 820, but supports PC100 and PC133 SDRAM. Also provides dual ATA-100 control and integrated Ethernet.