is x4 enough bandwidth for physx? can i use my x4 slot thats open ended on my gigabyte EX58-ud4p for physx? im running tril 280's for video. Id like to drive three monitors so if i stick another card in that slot i can do that and use that card as a dedicated physx card was considering a 9600gso for this. Would that work? also does anyone know if i use that x4 slot is that stealing bandwidth from one of my other video board slots?