This video dissects the internal workings of a 3090 Ti graphics card, focusing on its architecture and how it handles complex computations. Key takeaways include the differences between Single Instruction Multiple Data (SIMD) and Single Instruction Multiple Threads (SIMT) architectures, explaining how SIMT allows for more flexibility in handling varied tasks. The video explores the various processing cores (CUDA cores, tensor cores, and ray tracing cores), their functions in tasks like video games, Bitcoin mining, and AI. It also discusses the graphics memory (GDDR6X, GDDR7), its organization (e.g., through silicon vias), and data transfer rates. Crucially, the video highlights the significant computational power of GPUs, capable of trillions of calculations per second, and contrasts this with CPUs, which excel at managing diverse tasks but are typically slower in repetitive calculations. Finally, the video mentions potential manufacturing defects and discusses the overall design of the printed circuit board (PCB) and cooling system.