The Intel® 82801FB (ICH6) is a Southbridge chipset part of the Intel® 915G Graphics and Memory Controller that provides support for I/O functions in Intel® systems. It offers integrated support for Serial ATA (SATA) and USB 2.0. The ICH6 enhances data transfer speeds, improves system stability, and supports legacy devices. It connects the processor and other components, ensuring smooth communication between various system parts.