To change timings, go into bios (tap F2 repeatedly as soon as you power on or restart), go to oc tweaker and scroll down to dram timing control.
According to your linked CPU-Z, your current timings are 9-9-9-24-33 (tCAS-tRC-tRP-tRAS-tCS). You can change them to whatever is stated on the sticker on your ram.
your cpu-z frequency is 1333Mhz (since ddr is double data rate it is 665.2 x 2).