If your CPU is setup for power savings, you should see the frequency toggle back and forth occasionally. Overclocking disables certain features and usually locks the frequency (my i7-3770K toggles between 1600MHz and 3700MHz).
You can view your BIOS version here then compare at your motherboard support site to see if a newer version exists
The frequency shown is for a single stick. Your RAM should be installed in pairs though allowing TWICE this speed. If you have 1600MHz RAM you should see 800MHz or close.
Of note is the "SPD ext."; it can show you that a PROFILE is detected (though I'm not sure if that indicates you've selected it in the BIOS or whether it's just available).
*My 2133MHz RAM defaulted to 1600MHz at first even though the BIOS contained it's profile. I selected the profile (XMP) and the BIOS then automatically set it to 2133MHz with the exact timings.
**as mentioned, compare the shown TIMINGS and FREQUENCY to what the RAM should be at for optimal values.