We recently discovered an issue where some versions of NVIDIA graphics card drivers can severely degrade LightTools simulation performance. We have seen degradation on some workstations with Quadro series graphics cards, but it may affect others as well.
If you are operating on a PC with an NVIDIA graphics card and you have noticed a recent degradation in simulation speed, please ensure you have installed the latest graphics card driver from NVIDIA. If the performance is unchanged after installing the latest driver, please follow these steps:
1. Log into the PC locally. Settings changed when logged in remotely may not be applied correctly.
2. On your Windows desktop, right click and open the NVIDIA Control Panel. If you don’t have the NVIDIA control panel already, you can download this from NVIDIA.