We are looking into using an AD9129 in a new design. Your eval board (with the Xilinx ML605) is stated to run at 2400 MHz, with the Virtex-6 DDS core running at Fdac/3 (800MHz). According to the Xilinx data sheet, the maximum frequency the DDS core can run at is 452 MHz in the even-more-advanced Virtex-7. Can you explain how you are able to get this performance? Any guidance you could provide on running the AD9129 at 2400 MHz would be GREATLY appreciated.