Mastercam Version 2018 takes twice as long to complete 'area roughing' processes on the newest state of the art PC compared to the older specification PCs. Two PCs updated to Windows 10 1803, and a third on Windows 10 1709. The latest and greatest PC is a HP Z8 G4 (Intel Xeon Silver 4116 @ 2.10Ghz, NVidia Quadro P5000 Graphics Card, 64Gb of RAM) using Windows 10 OS. The older specifications (one on Windows 10 1709 and one on Windows 10 1803) both have Intel Core i7 - 6700 CPU @ 3.40Ghz) 32Gb RAM Graphics Cards are set to high performance, Mastercam settings to use Multi-threading. Monitor is plugged into the motherboard. Our company even tried use the Saved Configurations > MasterCam Saved Customisations interchangeably Why would the latest PC costing 3 times as much and much higher specifications take longer than the old hardware and identical software setup to complete the same calculations and toolpaths and so on? Any suggestions, and ideas welcomed!