MSI motherboards feature one or more PCI Express 2.0 slots, perfectly aligned & with enough space for an optimal airflow when using multiple graphics cards. That way, you will never have to worry about an overheating PC, while you are enjoying the best graphics jumping off from your monitor when running a AMD Cross Fire gaming setup. The core of Military Class 4 is based on the essentials which increase your stability in the worst conditions. The humidity protection & high temperature protection ensure your system surviving each environment, no matter how harsh. The structure of the PCB limits EMI radiation. On top of that all the connectors have ESD protection in order to prevent short circuit. SATA 6 Gb/s provides double the bandwidth of traditional SATA 3 Gb/s, & increases the data transfer rate between your motherboard & internal storage devices, such as 7200RPM HDDs, 10000RPM HDDs & SSDs. It's also the current trend for upcoming high-speed internal storage devices to break the existing bottleneck of a PC's performance.