How many watts for this system?

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Manseyes

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Sep 8, 2014
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i7 5930k (overclocked roughly 4.1GHz)
x99 G1 gaming board from gigabyte
4 DDR4 ram sticks
dual GTX 780's on sli
1ssd, 1 hdd
Corsair h110 cpu cooler
1 blu-ray writer
3 LED fans
2 non-LED fans (on the water cooler)
2 LED strips
gaming mouse, keyboard, headset all with LEDs

How big of a PSU will I need for all this? (this would be my dream DIY build, it will be my first real build, might scale it down depending on how much my budget ends up being)
 
Solution
V
GTX 780 TDP is 250W, 2 x 250W = 500W
Core i7 5930K has a TDP of 140W, allow 160W overclocked
Allow 40W for other components
Total draw 700W
This is mostly on the +12V rail and we only want to load this to 80% of rated power.
You need a power supply with a +12V rating of 73A or 876W.
Any top quality supply over 900W should cover this.
As mentioned above, pick a unit tier 2B or higher from that list.
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VincentP

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Oct 18, 2013
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GTX 780 TDP is 250W, 2 x 250W = 500W
Core i7 5930K has a TDP of 140W, allow 160W overclocked
Allow 40W for other components
Total draw 700W
This is mostly on the +12V rail and we only want to load this to 80% of rated power.
You need a power supply with a +12V rating of 73A or 876W.
Any top quality supply over 900W should cover this.
As mentioned above, pick a unit tier 2B or higher from that list.
 
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Solution
ZeusGamer

ZeusGamer

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Jul 9, 2014
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Not really, 850W with from a reliable company should suffice his needs.
 
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VincentP

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Oct 18, 2013
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The draw on this supply will be over 80% of it's rated maximum.
It will likely work because it is a good quality supply, but it will be very loud and as components age it will likely die prematurely compared to a properly rated supply.
 
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jimthenagual

jimthenagual

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Apr 8, 2012
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I wouldn't go for either of those myself. The RM1000 is known to have some cheaper capacitors in it. There are better 1000W on the market at the same price point.

The AX860i on the other hand, would be working pretty hard to power your system. It is enough, and will do the job. Many would say more than 850w is overkill, and they are right. It is. But I personally like a lot of headroom so the PSU isn't working as hard. If it were my system, I'd be looking at a 1000W. Extreme overkill, but that's what I'd do.

At the cheap end of the spectrum I'd be looking at the Rosewill Capstone 1000M $96.00 and if I had the budget I'd be looking at the EVGA G2 1000W $156.81

Also, efficiency refers to how much power is wasted in heat when the PSU draws from the wall. So if your 860W psu was drawing full load (theoretically) and it was rated 80+, then 20% is wasted as heat, so the PSU would need to pull 1032W from the wall to give the PSU 860W. The biggest advantage of getting a platinum PSU is not so much that it will save you electricity bills (it will in a small amount) but moreso that when they build Platinum PSUs they tend to use higher quality parts. That makes for a nice stable PSU. Not always the case of course, there are plenty of bronze PSUs that are extremely high quality, and many Platinums that are low quality.
 
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Dark Lord of Tech

Dark Lord of Tech

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