the Q8400 is a good gaming CPU if you can get it up to 3ghz.
plus you need to start saving for a new video card
otherwise go with the athlon II X3 (oofers the same gaming performance as the x4) or Phenom II x2 (two fast dual cores is still plenty for just about every game)
Thanks for your comment but I have another Q
My ram is DDR2-800 and the Q8400 is 1333mhz bus
is my ram ok?