Canada Goose Puncher
Join Date: Jun 2013
Location: Extra-west Virginia
It's probably looking at TDP. TDP isn't power consumption, but it can give you a rough idea. It stands for "thermal design power" and is the maximum amount of heat a particular component is rated to dissipate.
If they're not looking at TDP, then likely reviews measuring power draw from the wall. Great! Except AC-DC converters are never 100% efficient. A 100W CPU drawing power from an 80% efficient PSU will pull 125W from the wall. That's not enough to be concerned by if you're looking at, say, an 850W PSU, but when you're building a small system, every little bit matters.
There's not really an excuse to do that I don't think. Just get a high-power ammeter to measure current to a particular part. GPUs? That's easy - just measure the current through all the 12V lines. CPUs? A bit more difficult thanks to the VRMs, but you could measure the input to the VRMs (which would be more accurate for a PSU's needs but less accurate for a cooler).
Originally Posted by TheBadBull
someone sig this