Join Date: Nov 2009
Location: Chino Hills, CA
TDP can get you into the ballpark, but it could be off by a significant margin. With DESKTOP components, power draw is usually close to or a bit less than TDP, rarely over. This is because the chip manufacturers want their partners to design heatsinks for worst case scenarios. However, certain benchmarks can push certain graphics cards past their TDPs, e.g., Furmark.
Mobile devices have TDPs that are extremely close to their power consumption, usually within a watt or two. This is because both heat and power consumption are equally important to know very closely for a mobile device.
Burning books is like burning bras; after the adrenaline rush of the symbolic moment wears off all you're left with is a pile of ashes and unsupported boobs.