changing 24Mhz crystal in Logic PD 'OMAPL138 SOM Board

hello
As my project demands,i wish to change the crystal Y2(part number :1006395) to a crystal frequency of 18.432Mhz (of the  same vendor) . if i replace the crystal and adjust the clocking parameters(according to the .xls file provided by Logic PD to adjust clocking) i guess i would be able to generate a system clock fequency about 313.34Mhz .Well ,is there any problem in selecting such a frequency ? will it affect perfomance of my system and its supporting peripherals ? also am concerned about the digits after decimal point in the frequency generated,will these come into trouble if am willing to configure timer?

Expeceting a quick solution
Somu Sebastian