Geometry instancing is enabled by default when the Shader Model 3.0 path is being used, so it is enabled by default on any GeForce 6 board, providing you have forced the Shader Model 3.0 path, or are ...

Back when NVIDIA released the GeForce 6800 in April, they made great reference to the capabilities of Shader Model 3.0 - a feature that their competitors had chosen not to support in their new GPU ...