DDR3 vs. DDR2

[sonicone]

Is there a a noticable difference between DDR@ and DDR3? Should I worry about purchasing a computer with DDR2 if DDR3 is now readily available from most companies?

 

[r_manic]

Check this out: http://www.tomshardware.com/forum/245145-30-ddr2-ddr3

 

[sonicone]

Best answer selected by sonicone.