Budget-minded desktop owners do not have to lose hope in finding the right processor for their system. The humble yet capable AMD Athlon 64 LE-1640 is a single-core processor that sports a very low price tag and is energy-efficient to boot.
It has a thermal design power (TDP) of only 45 watts, which is pretty low considering its other features. The low TDP contributes much to its energy-efficiency since the rated TDP is actually the maximum power it will draw when running applications in real-time. So, you wouldn’t have to worry about rigging up an ultra-expensive cooling system unless your configuration recommends otherwise.
Servers and workstations differ from common desktop computers in that they need components that are more reliable and durable. Mainstream components including processors, disk drives and even the fans that keep the components from overheating, simply cannot achieve the level of dependability that the complex computing environments of server and workstation platforms require. 
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