To find out your ram timings, or rather what the manufacturer says they should be, download a program called "Everest Ultimate Edition" and run the hardware report wizard. If you buy a full version of this program it also has a wealth of other usfull tools and even a ram stress test feature.
I've been repairing / building PC's for over 10+ yrs now and I cant tell you how many times Everest has helped me out. Her's a link to the home page
http://www.lavalys.com/