With the ever-increasing demands and speeds of high-speed PCB channel designs, the speed and accuracy of SIwave can be improved by HFSS through the use of HFSS regions. This presentation will provide a comparison of the technique versus HFSS, a discussion of balancing accuracy versus simulation speed, ease of use, and employing HPC options to solve 3D regions in parallel. We will also be discussing future trends and what we’re doing to improve the method as time goes on.