NVIDIA Responds to Radeon HD 4830 Launch, Claims GeForce 9800 GT is Better | TechPowerUp
EVGA GeForce 9800 GT (512MB DDR3 PCI-E) Review: A small GPU that isn't too bad, but it doesn't measure up to the competition. - PC Components - Graphic Cards - PC World
GeForce 9800 GT vs GeForce 660 GTX review - Introduction
With Pascal Ahead, A 16-Way Recap From NVIDIA's 9800 GTX To Maxwell - Phoronix