Looking for a quick upgrade for better FPS

I haven't over clocked yet, I wasn't sure if that was totally safe. I don't want the risk of messing anything up. Is over clocking my only option? What could I get that would help me out besides overclocking? Sorry for all the questions, i'm new at all this pc stuff
 
Id your DRAM running at 1866? can check w/ CPU-Z, look in the memory tab should show about 933 in the freq pane, if not start off by going to BIOS and enabling XMP, that should get your DRAM set up correctly. Then find memory multiplier and change it to 40, save, exit and boot into Win....Should then be with DRAM at 1866 and your CPU at 4 GHZ, and is perfectly safe and fine, even with the stock CPU cooler