Compared to the other chipsets, the SIS648 looks to be in competition with the i845G and P4X400 in terms of features. Like the other chipsets, the 648 provides support for both 400 and 533 MHz FSB P4’s. Unlike the 645DX, the new 648 uses a 1 GB/s MultIOL interconnecting link between the north and south bridge. This makes the SIS 648 compatible with SIS’s new 963 south bridge that integrates USB 2.0 and ATA133 support.