How do I find if I have DDR2 or DDR3 ?

How do I figure out if my RAM is DDR3 or DDR2 ? How do I know the clock speed of My ram . I have Windows Vista . I tried searching the bios but no use .

Thank you.

CPU-Z will tell you.

Guitar Freak what is that Avatar! I loved that game back in the day on my old junk Sony machine. You remember the name?Masterdj1992