Back when i got my 1200W PSU things were looking like they were getting more and more power hungry so i felt justified in spending the extra for it... i really wish i had not done that now... even when my system was running two GTX 570's and 4X 2TB WD Black HDD's with AIO water cooling with my current processor and motherboard my draw from the wall maxed at around 720W (that's with everything overclocked too). I will be building a new system shortly after Christmas (sooner if my motherboard dies as it seems to be having issues lately, had to reduce my CPU overclock from 4.2Ghz to 4.0Ghz as it started to get unstable after years of running at 4.2Ghz). The new system I'm building is going to have the Corsair RM750i or HX750i as i honestly cant see myself needing more then that even if i run SLI GTX 1080 eventually with it, power efficiency in parts like GPU's and CPU's and even motherboards has gone up so much since i bought this power supply back with my old i7 920, and my new system will most likely ditch the HDD's all together and just run with 2X M.2 1TB SSD's + the two 1TB M550 SATA SSD's i already have. I kinda don't get "gaming" PSU's over 850W anymore, i could only see it being helpful if you are running some super over the top water cooling setup, hell Nvidia dropped support for more then dual card SLI now so don't need it for crazy 3x or 4x SLI setups now. Maybe.... its for people who game on a server or over the top workstation? lol

With a psu you only really want to be using about half the power available. So 1200w for an sli'd system would hopefully use around 600w max which would mean the psu is hardly under any stress and that usually means the psu is at it's most efficient running state. This increase life, decreases noise and heat and is the proper way of doing things. Sure a 750w psu will still perform fine on that sli'd system @ 600w but i'd personally prefer my psu at 50% rather than running at 90%. So 1200w is the perfect amount for an sli's system that uses around 600w. I have a 750w psu because it's perfect for my system that uses around half that and knowing it's purring away at it's most efficient 50% usage means less power wasted and all the good stuff that comes with that like noise, heat and longevity makes me less concerned with failure. Now if i was running my psu @ 70-90% usage then i'd probably be worried about heat and other issues like fan speed/noise.

Why there are PSUs with so much power ? I guess you forget watercooling enthusiasts.. (otherwise there is no way someone will need something more than 750W)

Why there are PSUs with so much power ? I guess you forget watercooling enthusiasts.. (otherwise there is no way someone will need something more than 750W)

Well if you went balls out with quad cf 290x.

Back when i got my 1200W PSU things were looking like they were getting more and more power hungry so i felt justified in spending the extra for it... i really wish i had not done that now... even when my system was running two GTX 570's and 4X 2TB WD Black HDD's with AIO water cooling with my current processor and motherboard my draw from the wall maxed at around 720W (that's with everything overclocked too). I will be building a new system shortly after Christmas (sooner if my motherboard dies as it seems to be having issues lately, had to reduce my CPU overclock from 4.2Ghz to 4.0Ghz as it started to get unstable after years of running at 4.2Ghz). The new system I'm building is going to have the Corsair RM750i or HX750i as i honestly cant see myself needing more then that even if i run SLI GTX 1080 eventually with it, power efficiency in parts like GPU's and CPU's and even motherboards has gone up so much since i bought this power supply back with my old i7 920, and my new system will most likely ditch the HDD's all together and just run with 2X M.2 1TB SSD's + the two 1TB M550 SATA SSD's i already have. I kinda don't get "gaming" PSU's over 850W anymore, i could only see it being helpful if you are running some super over the top water cooling setup, hell Nvidia dropped support for more then dual card SLI now so don't need it for crazy 3x or 4x SLI setups now. Maybe.... its for people who game on a server or over the top workstation? lol

I bought a Corsair RM1000i this summer and it's by far the best PSU I ever had, and since my system at full load (and oc'ed ofc) draws about 470-500W the efficiency is at about 93%, even in idle it's still at 90-91% according to C-Link. So yeah, very good stuff, the 750i should be the same. As for this Gigabyte PSU, it looks pretty good, although that bright orange is not really my thing. Black with white/gray accents is the best option, since you can match it with everything.