Re: Recommendations for a nVidia card for Linux 64bit.
Many of the earlier Socket 754 boards were AGP. I've had a GeForce 6600 GT AGP work fine on a S754 mainboard under 64bit Linux. What bugs did originally exist, have been fixed.
However I would not recommend investing in the card until NVIDIA release an Xorg 7.1 compatible driver. Modern 64bit distributions simply do not work with the current driver.