The MSI K7T-Pro 2A, like the K7T Pro and K7T Pro2 is based on the VIA Tech VT8368 (KT133) AGP/PCI/Memory Controller supporting 5 banks of SDRAM for up to 1.5GB PC100/PC133 SDRAM or PC100/PC133 VCM SDRAM. AGP4x protocol for ultra high speed video cards such as Geforce and Geforce2. 5 PCI Masters are supported onboard for 5 PCI slots. The VT8368 Northbridge also incorporates the asynchronous memory clock allowing you to run the memory clock at 133Mhz while the FSB remains at 100Mhz, This allows for PC133 SDRAM to be used at its full potential. The main difference between the K7T Pro 2A and the K7T Pro and K7T Pro 2 is that this new board uses the new VT82C686B super Southbridge for PCI/ISA integration. This allows for ISA expansion card, 4 USB ports, AC97 Audio and MC97 Modem controllers and native ATA-100 protocol.