As an experienced Linux System Administrator, I understand the importance of a smooth and optimized systems setup like yours. I have a proficient knowledge of Debian systems, including both its architecture and security measures, ensuring your server's stability and safety throughout the process. This foundational understanding is further underpinned by my years of experience in Nvidia drivers installation - a skill that plays a critical role in harnessing the full capabilities of your GTX 1660.
My experience with not only deploying Linux-based solutions but also optimizing and troubleshooting them will be crucial in this project. Additionally, being well-versed with command-line tools like SSH protocols, I am able to interact directly with your server regardless of whether it employs GPU or CPU for ffmpeg tasks.
Given the multitude of projects I have managed, about 2000 in 10+ years, I strictly adhere to professional standards. This means clear communication throughout, 100% satisfaction guaranteed \<Both these sentences are included on my previous paragraph below>, multiple options to choose from when tailoring the optimal solution, and timely completion without compromising quality. With all these compelling reasons, I can guarantee you a successful installation of NVIDIA drivers into your Debian 11 (Bullseye) server that optimizes ffmpeg performance and enhances video conversion for you.