it says my row refresh cycle time (trfc) is at 208 is that normal?



Trfc is around 260 nanoseconds for 4-gigabit DDR3 SDRAM chips and 160 nanoseconds for 2-gigabit DDR3 SDRAM chips. This can be converted into cycles by dividing it by the configured clock period. Note that Trfc is independent of the data rate, so overclocking the memory will result in a proportionally higher Trfc if Trfc is measured in clock cycles.