1. If the system is using sync-E and the recovered clock is used to drive the systemtimer_clk, the frequency could be in multiples of userclk.For any other systems, AMD recommends that rising edges of the systemtimer_clk clock be close to rising edges of usrclk so that accurate value can be sampled on the userclk domain. This can be achieved by having the systemtimer_clk running at a much higher frequency as compared to usrclk.