Corsair AX1200 good enough?

http://www.guru3d.com/articles_pages/asus_directcu_geforce_gtx_780_ti_oc_review,7.html

Here is Guru3D's power supply recommendation:

GeForce GTX 780 Ti - On your average system the card requires you to have a 550 Watt power supply unit.
GeForce GTX 780 Ti 2-way SLI - On your average system the cards require you to have a 800 Watt power supply unit as minimum.
GeForce GTX 780 Ti 3-way SLI - On your average system the cards require you to have a 1200 Watt power supply unit as minimum.

If you are going to overclock your GPU or processor, then we do recommend you purchase something with some more stamina.

Click to expand...

I didn't say anything .... the folks at Guru3D did all the testing and recommending.

Note however they used a "Our test system is based on a power hungry six-core Intel Core i7-3960X Extreme Edition Sandy Bridge-E based setup on the X79 chipset platform. This setup is overclocked to 4.60 GHz on all cores." Your 4930k draws a similar amount as I recall. If you had a Haswell, that pulls about 100 watts less so you'd be fine.....plus you have the water pump which my guess pulls another 20 watts or so.

I have a system with two water pumps, Haswell, 2 SSDs, 2 SSHds, 15 fans. It pulls 745 watts from the wall (using Kil-o-Watt meter) under Furmark and if I loaded up the CPU along with the GPUs full tilt, I guess I could get to 800 watts or so.....that would equate to about 720 watts of DC Output. Going twin 780 Tis, it puts out 30 watts more.

So doing the math 750 watts + 100 for your CPU + 275 for the 3rd GPU - 20 watts for my 2nd pump = about 1100 watts.

Keep in mind that over time, capacitor aging could take 10 - 15% of that away.

If it were me....since you have the thing already, I'd invest $20 in a kil-0-watt meter and plug in ya puter .... not the monitor or other accessories. Hook everything up and stress test. The AX1200i is about 89% efficient at that level loading

At 1,020 watts output (85% load), you should pull 1150 watts from the wall.... I wouldn't push it much more than that. Given that under "realistic scenarios, you will never see both CPU and all 3 GPUs at 100%.

The simple way is .....

Pull one of the 780 Tis .... run your stress test and record the wattage "at the wall" with just one 780 Ti .... say 540 watts
Put it back in and .... run your stress test and record the wattage "at the wall" with the two 780 Ti's .... say 825 watts

The difference will be what the 3rd card will add ~ 285 watts

You can therefore expect 825 + 285 = 1110 watts....since the 1200i is 90% efficient up near full load, the PSU is outputting 1110 x 0.90 or 1,035 watts or 999 watts which is 83% of full load and I'd be comfy w/ that

Yea it will be fine. The ax1200i is very well built. once you get ur new card, you can use the corsair link power monitoring to see how much power u are pulling. It will tell you if you need to upgrade ur psu.

And under regular loads, you wont even come close to 1200w, its just when you stress test all 3 gpus and cpu, when you might come close to pulling that much power.

Oh sorry I misread that. They are similar in that they are both good performers, but the ax1200i is a newer model with 80+ platinum rating.

I'd like it if it was a more modern case .... I like to mount extra fans on the back of the HD caged which blow right between the cards. I wish ya didn't have the h100i .... if ya had the H220-X, you could just add a radiator and some tubing fittings and a set of water blocks and water cool the cards. It's been a while since I used an HAF but I don't remember them being to friendly to water cooling but an external rad would work.