Guys, the GeForce FX 5500 512 MB is a low cost card from 2006 supporting DirectX 9.0, being slower than a GeForce 3 or a GeForce 4 TI 4200. If that rings any bell. If it really got an SLI slot and you put a Radeon 4650 into that, you'll cause a spatial distortion warped in time making us all vanish in a black hole.