Hi Michael, Our group is using roach2 with adc5g running at 2.5GHz. We never tried sampling faster than that. The ADC works just fine at 2.5GHz. The troublesome is to program FPGA (Virtex6) at 312.5MHz. Routing becomes difficult when the more resources (FPGA slices) are used up.
Hope it helps. Weiwei -- Weiwei Sun Radar Remote Sensing Lab Department of Electrical Engineering University of Washington (Seattle)
