Refined my build please inspect :)?

[Seox667]

Hi again, not really sure if I'm meant to repost sorry. I took your advice and made changes to the system. I don't know how Quad channel works, can 2 sticks of ram utilise it? ? and I'd only use an 8gb stick x1 if Quad channel isn't effected sorry noobs questions Is this power supply good and will allow me to sli the 780? also is the Heatsink I chose good enough for overclocking? thanks guys

(This system is for gaming with crysis 3, witcher 3,bf4 with the goal of never dipping below 60 fps at 1080p)

 1 x Thermaltake Full ATX Overseer Case Black with Dock (No PSU)
 1 x ASUS S2011 ATX Rampage IV Extreme Motherboard
 1 x Intel S2011 Core i7 3820 3.60GHz Quad Core CPU (No Heatsink included)
 1 x 256GB Samsung 2.5" 840 PRO Series SATA 6Gb/s SSD Drive PN MZ-7PD256BW
 1 x NVIDIA GTX780 3GB Gigabyte OC PCIe Video Card PN N780OC-3GD
1 x DDR3 16GB (2x8G) 1866MHz Kingston XMP Predator RAM PN KHX18C9T2K2/16X
1 x 900 Watt Antec HCG-900 High Current Gamer Power Supply
1 x Zalman CNPS12X S2011 High Performance CPU Cooler (PN CNPS12X)

 

[butremor]

900w is enough for sli
To utilise quad channel 4 sticks is needed.

You can continue asking questions in your previous thread, or at least give link for people to know some background.