This document summarizes and compares the specifications of several NVIDIA graphics cards including the GeForce 210, GT 220, GT 520, GT 550M, GT 440, GTS 450, GTX460 1GB, GTX560, GTX580M, GTX560ti, GTX470, and GTX590. It provides details on the GPU engine specs like CUDA cores and clock speeds, memory specs like amount and bandwidth, thermal and power specs, and price ranges for new and used cards. The document recommends the GT440 for CUDA beginners and the GTX560ti or GTX470 for CUDA intermediate to advanced users.