Question: I have a Dell Poweredge R200 server which has an ancient Xeon 3065 processor. I see in the servers specs that it can accommodate Xeon 3200 series, but not sure if I buy a bare-boned Xeon 3220 processor (without heatsink etc.) , will it fit easily on motherboard? If not, what exactly should I buy to upgrade my processor? Thanks

Answer: 
It will physically fit yes, they're both LGA775 chips but the 3220 has a TDP of nearly twice that of the 3065, you may have heat management issues that would affect the life of your server.
You wan a Dell #311-8328 CPU Upgrade kit. Doesn't void the warranty and comes with a properly sized heat sink (might be the same, might not).