No, that recommendation is for the whole system. If you want to do it that way, use the TDP of 140W. USB sticks are limited to 2.5W (most won't ask for the extra current, and get 0.5W), and on the 5V rail. RAM is a couple of watts per stick.
That's a close to worst-case scenario, base on running a power-guzzling CPU (e.g. FX 125W+) etc. on a low-quality PSU that can't handle what it's rated for. My "minimum" in this case, would be around 300W, assuming no OCing and a good PSU (though I wouldn't recommend it unless you are trying to use an SFX- size PSU or some other space-limited factor).
For a system using a single GeForce GTX 660 (non-Ti) graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.
Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the critical factor.
Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.
The Corsair Builder Series CX500 (SKU# CP-9020047), with its maximum combined +12 Volt continuous current rating of 38 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 660 (non-Ti) graphics card.