Power issue for new computer build?

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jnilsson618

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Apr 2, 2017
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I have a 620W power supply and a PNY Geforce GTX 680 (I know, I could get a better one, but my budget has run dry after buying everything else and graphics card is the least of my worries since it is, in performance, similar to a GTX 1050 Ti). The specs page for the specific model of my graphics card says that the minimum wattage that my power supply needs to be is 550W. Does that mean that the graphics card is always using ~550w? I just bought a Core i7-7700k which supposedly takes a max of 92W. If the answer to the previous question is yes, will I have to get a power supply with more wattage taking into account that I also have a 1tb hard drive and an SSD and maybe an optical drive?
 
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amtseung
There is a difference between power consumption and TDP. The 7700k has a TDP of 91W. It consumes closer to 100W of power at stock settings at 100% load.

The recommended 550W PSU includes considerations for the entire system. You can guess how much power the card will use at maximum by the power plugs on it. The PCIe slot it sits in will provide maximum 75W, a 6pin power plug is another 75W, and an 8pin power plug will be 150W.

From images of the GPU, it's got two 6-pin external plugs (I personally love the look of that vertical stacking of power plugs rather than the side-by-side look, but I digress), so that would be 75W x 3 = 225W max. Back in those days, CPU's consumed way more power, as did RAM and other components, so I wouldn't...
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amtseung

amtseung

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There is a difference between power consumption and TDP. The 7700k has a TDP of 91W. It consumes closer to 100W of power at stock settings at 100% load.

The recommended 550W PSU includes considerations for the entire system. You can guess how much power the card will use at maximum by the power plugs on it. The PCIe slot it sits in will provide maximum 75W, a 6pin power plug is another 75W, and an 8pin power plug will be 150W.

From images of the GPU, it's got two 6-pin external plugs (I personally love the look of that vertical stacking of power plugs rather than the side-by-side look, but I digress), so that would be 75W x 3 = 225W max. Back in those days, CPU's consumed way more power, as did RAM and other components, so I wouldn't be too worried about having a 620W PSU. Unless it's a bottom-tier fire hazard.

If you want a better estimate of power consumption, Outervision's PSU calculator (advanced or extreme or whatever) is pretty good.

TL;DR I doubt your rig will ever pull more than 400W total unless you're overclocking and running multiple pumps and cathode ray tube lights off of it as well. Even then...
 
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