AMD Processors
Low-End: Athlon X2 BE-2350
The Athlon X2 BE-2350 provides solid desktop performance at a rated thermal design point of only 45 W. Although Intel also has energy-efficient processors, the Core 2 Duo and Pentium Dual Core lineup is rated at a maximum of 65. In theory, the low-power AMD processor should have a significant advantage when operating with insufficient cooling.
The Athlon X2 BE-2350 runs at 2.1 GHz clock speed and has two 512 kB L2 caches. It is based on the current 65 nm DSL SOI process, which provides superbly low leakage currents. These processors utilize Socket AM2 at a 1 GHz link speed. Note that all Athlon 64 X2 processors are rated at 68 W or up, while this processor, though technically similar, is specified at only 45 W.
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Potential fan failure is a good reason to use a push/pull fan set up on a tower CPU cooler.
I've yet to have a CPU fan fail as I've always bought quality fans with ball bearings, but if you use sleeve bearing fans, or have a problem with dust then the fans is a lot more likely to fail.
This is very interesting. I am suprised that the Athlon BE series does not run cooler than the Pentium DC.
All of this begs the question - If I want to build a system with decent performance (read: modern dual core CPU), but I want it completely silent, which CPU, and which heatsink would I have to buy?
I am presuming that a 3rd party heatsink might provide enough cooling to enable some of these CPUs to run without a fan without throttling.