GPU enabled VMs in VCL

As of spring 2023, VCL has 8 systems available with each having an NVIDIA GeForce RTX 2080 Ti attached. All users can reserve an Ubuntu image to get access to one of these. Users with access to on-prem Windows resources can also access a Windows image (accessing on-prem Windows resources requires your college or department to purchase an additional Microsoft license for you). Due to the limited number of GPUs available, these images are limited to only allow reservations for up to 3 days (for those that have access to make reservations longer than the default of several hours).