Where can I find out how much power "Computer Part of the Day" uses? It's easy to do a search and find out that a system built with the part du jour uses X watts under load and Y watts when idle but I can't find resources that list the power consumption for individual parts.
To add to the confusion, I found a table at Tom's Hardware that purports to list the power used for each part (CPU, motherboard, RAM, HDD, SSD, etc.) but they don't say where they got their numbers.
Example:
For the Intel i5-370k, Intel says that the TDP is 77 watts. I find a review that says a system built with the CPU uses 67 watts at idle and over 90 watts when under load.
I'm particularly searching for information to build a new PC so I need figures for the CPU, motherboard, RAM, HDD, optical disk drive, fan(s), graphics card, and maybe even SSD.