Optiplex 760 CPU support help

Hello,

So i ended up getting an older opti-760 with a core 2 duo. Booted it up, updated the bios to a16, and now i want to know if it should handle my old core 2 quad 9650.

According to a few power supply calculators, the 235 watt power supply should handle it.

I have read that there were a few motherboards that were released with this model, some support quad core, some are hard set to only use dual core, but i am unable to find the exact documentation to figure out what board i actually have. I do have my service tag, but browsing dell's support site doesn't give me a whole lot of information in this regard.

Any help would be appreciated.

Phil