I could be wrong, but I'm relatively certain the 965 will support quadro with a simple bios upgrade. I think most people overlocking c2d's are having the most sucess with 965 actually. I remember reading I think it was an anandtech article where they kept saying the 975 was the better oc'r but in the forums people kept saying that that wasn't the case at all, and people were generally having more sucess with 965.
"well any motherboard which supports core 2 duo today(965 and 975 series chipsets)will support kentsfield with a bios update.
I'm not sure about the 945 series.
So to answer ur question.Ur safe with a 965 series mobo."
just an excerpt from an anandtech forum dealing with quad core compatibility