I bought a new motherboard which have "PCIEX 16 Slot which is compilant to the PCI Express Gen 1.0" . and buying a new entry level graphic card Nvidia Geforce 9400 GT which says at least you have to have "PCI Express or PCI Express 2.0 motherboard with at least one X 16 Graphics slot. I am confused with all above system specification and their meets. Could you help me?? Do I have to replace the motherboad?