The 7 series FPGAs transceivers are power-efficient transceivers, supporting line rates of 6.6 Gb/s for GTP transceivers, 12.5 Gb/s for GTX transceivers, and 13.1 Gb/s for GTH transceivers. The GTX/GTH transceiver is highly configurable and tightly integrated with the programmable logic resources of the FPGA. For each of these line rates, you can select a custom value based on your requirements, or you can choose from pre-provided industry standard protocols (for example, CPRI, Gigabit Ethernet, or XAUI). Specify the number of serial transceivers for each line rate that is programmed with these settings. Because usage of the Quad PLL (QPLL) is recommended for line rates above 6.5 Gb/s, you can select QPLL/CPLL for each line rate falling in the range 0.6 Gb/s to 6.5 Gb/s.