Cant handle CPU Max Clock! Hello Masters of Android! I am using Galaxy S5(SM-G906S)(Qualcomm SnapDragon 801). I have a problem. The problem is that I can't handle CPU Max Clock.. Available Max Clock is 2457Mhz but system always set to 1728Mhz.. It causes some lags... How can I Solve this.. I already did factory reset using Kies...
Actually, even if you know that a kernel can allow you to overclock your CPU to a certain speed, there's a little file which consists of a frequency limit.

This file is to be found into /sys/kernel/cpufreq, and its name is hardlimit. Inside it, you'll find the maximum frequence, defined in Hz. For instance, and for your case as well, its content will be 1728000, which is equal to 1728MHz.

By using a root file editor, which usually integrates a text editor feature, you can edit this limit to the desired frequence (in your case, 2457000. Please notice that, even if you succeed in editing it, the file may be rewritten after a reboot. Given that, make sure to check if your kernel supports init.d, and, if yes, write a little script to change the file at boot.