IMO, AMD CPUs are cheaper, slower and more power hungry while Intel CPUs are more expensive, faster and less power hungry. I'd rather have a 2600K over an FX-8150, but everyone knows that the initial investment cost is higher. However, if you are running something at 100% load and hang onto it for a long time, the more efficient but more expensive CPU will win simply because it will repay itself in saved energy costs.
Same thing goes for air conditioners. High SEER units cost a ton but are much more energy efficient than cheap bargain units, and will pay for themselves with saved energy costs.
And about the AMD CPUs running cooler, that's partially true/false. For one, AMD's sensors at idle have read below room temperature on most of my Phenom or newer chips (like, 19c in a 30c room). Intel's CPUs seem to have more accurate sensors, but remember, most of Intel's newest CPUs are built on more advanced process nodes with smaller die areas, and physics tells us that something with less surface area compared to its mass has a harder time dissipating heat compared to something with a huge surface area and the same mass (which is why we add huge metal devices called heatsinks to our CPUs and attach them with thermal paste to provide optimal heat transfer, since thermal paste fills in all the microscopic pits in the metal surfaces and makes the CPU/heatsink combo more like one big solid). The real life analogy here is the fat guy who is always hot versus the skinny chick who is always cold.
That's pretty high ambient, at least for me. If you had that down some your temps will improve drastically. But I say those temps are fine.
Unfortunately, I run 12 rigs at work and the conditions are not perfect of course. We have 3 tons of cooling capacity, but it's an office area built inside of a steel warehouse strip, so the ambient temp surrounding the office is always 80-100F+ in the Summer. Winter (if we actually still have those thanks to the possible "global warming") will be much better for my operations.
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