V6 is substantially slower on some things than V5. It is somewhat difficult to use on my old P4 2.8-3.0s with 1.5 to2 gigs of memory.
Screen rewrites in the prescription writer and the ICD preemptive look up make the big difference. The basic startup, log in and chart writing, even the search are not significantly different.
I had 2 dual cores I was going to upgrade my main machines with but instead put them at the front desk and one of the exam rooms. I sometimes use logmein to another computer because it overcomes the screen rewrite issue for some reason. The program works well with dual cores.
I have been in discussions with AC about this issue.