Can a EVGA SuperNOVA 750 G3, 80 Plus Gold 750W PSU Overclock and run a i7-8700K and a 1080ti?

Yes of course.

(6+2) = 8-pin PCIe connector or you can leave the +2 off and use it as a 6-pin connector.

Yes, it has 2 8 pin cables.

You could easily power that system with the 550W version.

550w would do that.

If you think you'll want more power for future generations of cards, they also make a 650w model.

50% PSU load is optimal for a PSU, so the 750W (or 650W) would be better in quality of performance and durability. 550W would only be better in cost and budget.

If you think you'll want more power for future generations of cards,

Click to expand...

Generally, "future" cards prove to be more powerful while consuming the same or less energy. They are simply more efficient.
And I agree 550W is plenty, even for overclocking.

50% PSU load is optimal for a PSU, so the 750W (or 650W) would be better in quality of performance and durability.

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How is 50% optimal? The G3 performs pretty similar at 50% compared to 90%. And 300-380W (load consumption of OP's sytem) will produce about the same heat in the EVGA G3 550 as the G3 750, as they are have similar heat draw.

A G3 550 wouldn't be called a "550" and rated for 24/7 operation at 550W for 7 years if it was only supposed to deliver half of that

Virtually every PSU has the best efficiency at 50% load. More load produces more heat due to lower efficiency. A lower efficiency WILL produce more heat, that is where the lost power is going, heat. Now, with a high quality unit in a gaming system that wouldn't be under full load 24/7, the difference could be small enough to be considered negligible. The 550 G3 still does well at higher loads.

I'm not sure about EVGA, but I know according to a SeaSonic rep. their consumer PSUs are not rated for 24/7 operation at max capacity, their consumer units are rated for 8 hours/day max capacity. But the rep. also said that doesn't mean it won't last at 24/7.



https://www.pcper.com/reviews/Cases-and-Cooling/EVGA-SuperNOVA-550W-G3-Power-Supply-Review/Efficiency-Differential-Tempera

I've heard some rumors the new cards might draw more power on the top end. I understand they usually get more efficient.

I've heard some rumors the new cards might draw more power on the top end. I understand they usually get more efficient.

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I would wait till we see the cards before we know for sure. Typically, they do get more efficient, so let see how the new cards shape out. I have seen projections for 180 watt cards at the high end for the next generation. The 1080ti is a 250 watt card, and it will be a very disappointing launch if the 1180/2080 cannot top 1080ti performance.

As far as 550 watt vs 650 watt vs 750 watt, it is really kinda moot when looking at the pricing of high end PSUs with middle of the road wattage. The price difference between 550 watts and 750 watts is usually only a few dollars. For example, here are two Corsair TXM Gold PSUs. Both are excellent PSUs. The 550 watt is $68.89 and the 750 watt is $69.99. For me, I would spend an extra $1.10 for another 200 watts, just for breathing room.

PCPartPicker part list: https://pcpartpicker.com/list/R2MMQV
Price breakdown by merchant: https://pcpartpicker.com/list/R2MMQV/by_merchant/

Power Supply: Corsair - TXM Gold 550W 80+ Gold Certified Semi-Modular ATX Power Supply ($68.89 @ OutletPC)
Total: $68.89
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-08-13 11:58 EDT-0400

PCPartPicker part list: https://pcpartpicker.com/list/bDWczM
Price breakdown by merchant: https://pcpartpicker.com/list/bDWczM/by_merchant/

Power Supply: Corsair - TXM Gold 750W 80+ Gold Certified Semi-Modular ATX Power Supply ($69.99 @ Amazon)
Total: $69.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-08-13 11:58 EDT-0400

Here is another, Seasonic Focus Gold, the 550 watt cost $59.01 and the 750 watt cost $63.04. In fact, the Focus Gold 650 watt PSU cost .16 more than the 750 watt PSU. So which do you think the smart consumer should purchase?

PCPartPicker part list: https://pcpartpicker.com/list/NwKdjc
Price breakdown by merchant: https://pcpartpicker.com/list/NwKdjc/by_merchant/

Power Supply: SeaSonic - FOCUS Gold 550W 80+ Gold Certified Semi-Modular ATX Power Supply ($59.01 @ Newegg)
Total: $59.01
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-08-13 11:59 EDT-0400

PCPartPicker part list: https://pcpartpicker.com/list/Q8Dmd6
Price breakdown by merchant: https://pcpartpicker.com/list/Q8Dmd6/by_merchant/

Power Supply: SeaSonic - FOCUS Gold 750W 80+ Gold Certified Semi-Modular ATX Power Supply ($63.04 @ Newegg)
Total: $63.04
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-08-13 11:59 EDT-0400

PCPartPicker part list: https://pcpartpicker.com/list/4xbz8K
Price breakdown by merchant: https://pcpartpicker.com/list/4xbz8K/by_merchant/

Power Supply: SeaSonic - FOCUS Gold 650W 80+ Gold Certified Semi-Modular ATX Power Supply ($63.20 @ B&H)
Total: $63.20
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-08-13 11:59 EDT-0400