I am using Cuda 2.0 Beta on XP with a Quadro FX4600 displaying to dual monitors. If I run my program with the cmd window on the left (#1 screen) I get a data transfer time of .51ms or 2938.99MB/s, but it I run the same program from the same cmd window on the right (#2 screen) I get a data transfer time of 1.21 ms or 1248.59MB/s.
Anybody have any idea on why this would be? I have run the program on each screen ~ 20 times each showing this trend. I should also note that this also did this for Cuda 1.1.