What? A SYSTEM with a 1060 would need ~400W, not the 1060 itself. And a Corsair 450W can put out a lot more than 280. Even on a "consistent" basis.It is underpowered because the 1060 needs a minimum of a 400W PSU. You then have to take into account the efficiency of the PSU into account, again, and it can offer on a consistent basis 280W. Take a look at the sticker on the side of the PSU. You could also take a pic. Do you see +12V? What's the number(s) directly below that. It should say something like 35A but it's probably closer to 20. That +12V rail i what feeds the GFX card.
Nope, doesn't work like that. That will simply give you 80 or 90% of the number you figured. Remember that when dealing with efficiency like this the number will always be bigger, not smaller. Look above for the example of that. 250W, 80% efficient, 312.5W from the wall. Doing what you said to do would give you a number of 200W, which is wrong. I do it the long way because that's the way I learned first. Figure out the power draw, multiply that by 100. Now divide that by whatever the efficiency is. 80, 82, 85, etc. Remember that you need the expected efficiency at whatever load the PSU will have. The max efficiency of a PSU might be 88%, but that's at 40-75% load. If you bought a 750W PSU for your 250W load PC, you aren't at 40%. You need to use the lower 82% efficient number for the lower load.If you want to know what your components would draw from the wall....look at the specs of each component....add up the power draws and divide by the efficiency.
If the efficiency is 80%......divide by .8. 90%....divide by .9 and so on.
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