I wanted to upgade to a server for IOMMU support. I live in a one room apartment, so I want to keep the heat down so my PC will be a silent as possible in regards to fan noise.
Right now I have a AMD Phenom II quad core that is 65watts. I see that the "Intel Xeon E3-1265L V2 Ivy Bridge 2.5GHz (3.5GHz Turbo) 8MB L3 Cache LGA 1155 45W Quad-Core Server Processor BX80637E31265L2 " is 45watts. Does this mean the Intel Xeon would put out less heat than my Phenom II?
Yes, but 20W can't make much of a difference. Replacing a 60W light bulb by a 40W will achieve the same.
Nice example. GhislainG is right, the difference in heat production by the CPU itself will be negligible. If the current rig is meeting your computing needs, you might look at solutions to make it run cooler/quieter.