Yes.The speeds of RAM that have been created are over 2x faster than what was around 2 years ago.DDR2 I believe has a fastest speed of around the 800-900MHz mark, while the fastest DDR3 ram i as fast as 1600MHz, which is pretty quick compared to the best of DDR2.I have 1066Hz DDR3 in my laptop and that is fast enough, way faster than the DDR2 in my old desktop.... than again, hard to compare when its old.But for normal use, you won't notice too much of a difference, progams and internet pages etc will load faster than with slower RAM, but for gaming, an increase in frame rate and overall performance will be noticed.