I am about to purchase a new system. Having read various comments regarding PCI Express I understand that at the present time the full benefit will not be seen. I would ask if anyone out there could answer the following. 1. The PCI Express system I am looking at is fitted with an ATI Radeon X800XT graphics card.Will this perform at the moment at least as well as the AGP equivalent. 2. Will the games I presently own operate with the PCI EXpress graphics card.