I just bought a new nvidia 9800 gtx pcie 2.0 card for my system. I am wondering if I should upgrade my MB as well, b/c it only has a PCIe x16 slot. Would I see a difference with a pcie 2.0 MB or not. thanx in advance
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No keep your motherboard.
^ agreed, there's no problem whatsoever with your old motherboard and the PCIeX16 1.0 socket.