The X8a incorporates NVIDIA's nForce® 780 chipset supporting AMD® Athlon 64/X2 processors. It provides two physical PCI-Express video slots, and uses a switch to divert 8 PCI-Express data lanes to serve each slot. NVidia's new SLI (Scaleable Link Interface) technology is used to link two nVidia based cards together, The technology requires a pair of compatible videocards (Nvidia Geforce 9500GT models and above) with SLI connectors (must be implemented by the video card manufacturer)

NVIDIA nForce® 780 SLI™ MCP
• NVIDIA NVIDIA nForce® 780 SLI™ MCP (media and communications processors) - For High Performance Gaming. The NVIDIA nForce® 780 SLI™ MCP features AMD Socket AM2 processor support, 1 GHz HyperTransport link and revolutionary NVIDIA SLI™. Together with 6 Serial ATA ports enabled through the SATA 3Gb/s RAID controller, Dual Gigabit LAN controllers and High Definition Audio Interface, the NVIDIA nForce® 780 SLI™ MCP delivers exceptional performance and really satisfies your demand.


NVIDIA SLI™ Technology
• Ultimate Gaming Performance with NVIDIA SLI™ Technology
NVIDIA® SLI (Scalable Link Interface) takes advantage of the increased bandwidth of the PCI-Express bus architecture and features intelligent hardware and software that allows two GPUs to efficiently work together to deliver earth-shattering, scalable performance. For some applications nearly 2X performance! (From www.NVIDIA.com)