Is there a true performance difference between Mushkin's level 1 and level 2 memory that makes the level 2 almost twice as much. I am interested in getting 1GB of memory to be used in a pentium 4 2.6 system with a slight overclock (probably overclocked to 3.0 and no more). Will the level 1 be sufficient or will I really get a significant increase for video editing and gamaing?