Which NVIDIA video cards support the AGP 1.5 volt spec that my motherboard requires?
The Geforce family and Quadro family based cards can operate at AGP 1.5 volts. Some of the older Geforce and Quadro cards follow the AGP 2.0 spec (AGP 4x and AGP 2x) meaning they will operate at 1.5 volts or 3.3 volts. The newer video cards follow the AGP 3.0 spec (AGP 8x and AGP 4x) meaning they will operate universal at 1.5 volts and .8 volts. This operation is negotiated automatically and is not a user defined option.