Used - Very Good: EVGA GeForce GTX 600 SuperClocked GeForce GTX 660 Video Card 02G-P4-2662-KR - Newegg.com
GeForce 600 Roadmap Partially Exposed, GTX 670 Ti Coming in May | VideoCardz.com
How To Overclock a Nvidia Geforce GTX 600 Series Part 1 Basics Overclocking GTX 670 or Other GTX 600 - YouTube
Goodbye Kepler: NVIDIA announces that GeForce GTX 600 and 700 series cards will stop receiving new Game Ready Drivers from August 2021 - NotebookCheck.net News
It's official, Nvidia will end GeForce GTX 600/700 series support in October | PC Gamer
NVIDIA GeForce 600 Series GTX 680, GTX 670 and GTX 660 Ti Reach End-Of-Life