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
GeForce 600 series - Wikipedia
EVGA Launches its GeForce GT 600 Series Products | TechPowerUp
Geforce 600 Series Gen3 Support On X79 Platform - TheOverclocker
NVIDIA Planning to End Support for 600/700 Series GPUs
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