It's official, Nvidia will stop supporting GTX 600 and 700 GPUs from October | Rock Paper Shotgun
NVIDIA GeForce GTX 660 Ti Graphics Card: Affordable Graphics Powerhouse | Windows Experience Blog
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
ZOTAC GeForce GTX660 2GD5 2GB Graphics Card 192Bit GDDR5 Video Cards GTX 660 2GB GTX 600 For nVIDIA Original Map Devastators|Graphics Cards| - AliExpress
GeForce 600 series - Wikipedia
NVIDIA To Retire Its Kepler GPU Architecture 'GeForce 600 / 700 Series' With R470 Drivers
GeForce 600 Roadmap Partially Exposed, GTX 670 Ti Coming in May | VideoCardz.com