The RDX200 CF-DR is designed with a total of 2 CrossFire capable PCI-Express x16 ports, 1 PCI-Express x1 port, and 3 PCI slots. Along the outer edge of PCI slot 3 are the FAN4 and FAN5 headers, the COM port header, and the Standby power LED. The Standby power LED illuminates when an active power source is connected to the board. In the upper left corner of the board are 4 diagnostic LEDS that can be used for troubleshooting board startup issues..



Link: HardOCP