Will 780 ti SLI will run on AX850w?

Solution
Yes you can run two 780Ti's in Sli on a AX850 here is a build I created to demonstrate click the build link and look a the wattage its 715w. Also to note I added quite a few things as overkill to try to build the validity of it working just fine :)

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor ($309.99 @ NCIX US)
CPU Cooler: Corsair H110 94.0 CFM Liquid CPU Cooler ($99.99 @ Amazon)
Motherboard: Asus MAXIMUS VII HERO ATX LGA1150 Motherboard ($228.99 @ SuperBiiz)
Memory: Corsair Dominator Platinum 16GB (2 x 8GB) DDR3-2400 Memory ($229.99 @ Newegg)
Storage: Samsung...
Yes you can run two 780Ti's in Sli on a AX850 here is a build I created to demonstrate click the build link and look a the wattage its 715w. Also to note I added quite a few things as overkill to try to build the validity of it working just fine :)

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor ($309.99 @ NCIX US)
CPU Cooler: Corsair H110 94.0 CFM Liquid CPU Cooler ($99.99 @ Amazon)
Motherboard: Asus MAXIMUS VII HERO ATX LGA1150 Motherboard ($228.99 @ SuperBiiz)
Memory: Corsair Dominator Platinum 16GB (2 x 8GB) DDR3-2400 Memory ($229.99 @ Newegg)
Storage: Samsung 840 Pro Series 256GB 2.5" Solid State Drive ($196.98 @ OutletPC)
Storage: Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive ($73.98 @ Amazon)
Video Card: EVGA GeForce GTX 780 Ti 3GB Video Card (2-Way SLI) ($687.99 @ SuperBiiz)
Video Card: EVGA GeForce GTX 780 Ti 3GB Video Card (2-Way SLI) ($687.99 @ SuperBiiz)
Power Supply: Corsair 860W 80+ Platinum Certified Fully-Modular ATX Power Supply ($169.99 @ Amazon)
Optical Drive: Asus BW-16D1HT Blu-Ray/DVD/CD Writer ($74.99 @ Newegg)
Total: $2760.88
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-28 16:44 EDT-0400)
 
Solution