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Kill-a-Watt Power Draw Inaccurate?

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Jan 20, 2017
Boulder, CO
I run a few big machines for [email protected] and I'm trying to estimate my power draw from each machine.

I picked up a Kill-a-Watt device from Home Depot but I'm worried that it's inaccurate when reading consumption based on wattage.

Based on the benchmark reviews I've seen, a single 1080 Ti, on full load, should pull 300+ watts, but my machine with 3 x 1080 Ti and an i7-5930K doesn't pull over 850. Now, I know there won't be as much of a draw as I don't have a lot of components like a monitor or anything, but this still seems too low. The reading in the picture was at full [email protected] load with each card sitting aroung 72C and fan speed manually set to 85% on each card.

Does anyone have an explanation for this? Is this too low to be believed?

3 x 1080 Ti @ 800W

2 x 1070 @ ~400W

1080 Hybrid + 1070 @ ~450W


Sim Racing Aficionado Co-Owner
Jun 28, 2012
So you see no problem with this reading? I just need a second opinion given that I run these 24/7.

Find a review that actually shows GPU power instead of system power (they do exist) and then add up the usage to see if your meter is accurate.