Old Graphic Card & Latest Premiere Pro

Guess what? The GT 1030 has never been on the list of either "recommended" or "supported" GPUs because it is missing one or more processing features that help enhance performance and quality. Specifically, the GT 1030 is based on the GP108 chip that does not have a hardware H.264 or HEVC decoder or encoder at all, forcing all decoding and encoding on your CPU.

Worse, the GT 1030 is not compatible with any of the Studio Drivers at all. Only the Game Ready Drivers are compatible. The Studio Drivers for GeForces require a minimum 128-bit VRAM bandwidth - but the GT 1030 has only a 64-bit VRAM bandwidth. The Studio Drivers also require hardware NVDEC and NVENC support both present and enabled - something that the GT 1030 and all other GP108 chip-based GPUs do not have at all  (these hardware decoders and encoders are completely missing from the GP108 chip).

AFAIK the Premiere Pro 2017 recommended GPU list (now no longer available at all on Adobe's Web site) has not been updated at all since the very first version of Premiere Pro CC (2014): Its recommended GPU list for GeForces did not go past the GTX 780. The GT 1030 is newer, about the same age as the GeForce GTX 1060 6 GB that is on the Adobe recommended (or supported) GPU list. The GT 1030 is based on a new low-end Pascal chip with less features and less performance, and is not a rehash of a Kepler- or Fermi-generation low-end GPU.