I just built a system with 1G Tbird, 256MB Crucial pc133 C2 ram with the Cardex video card. This card was a best buy in several recent PCWorld mag ratings. I am using the A7V MB at 4x AGP in bios. Latest nvidia drivers and 4in1 drivers. The card works OK but is jerky in some of my videos. My other system a Cmine 550e on Asus p3v4x with VooDoo 3500 card is much smoother. I expected something better with the Cardex??? Any help appreciated. I don't see any way to OC the memory or chip on the Cardex with my utilities that came with it.