Hello and thank you, I'm building my first PC with a little help but I'm putting together the components. What I need to know is, is a Corsair Professional Series 850W SLI 80 PLUS Gold Certified Modular ATX Power Supply, Strong enough to Power ( ASUS Sabertooth Z87 Intel Z87 LGA 1150 Motherboard) ( Intel Core i7-4771 3.5GHz Processor ) ( EVGA GeForce GTX 770 4GB Dual FTW w/ EVGA ACX Cooler) ( WD Desktop Performance 2TB Internal Hard Drive ) (Samsung 250GB 2.5" SSD 840 Series x2) ( Corsair Vengeance LP 16GB (4 x 4GB) 1600MHz DDR3) (Asus 12x OEM Blu-Ray Writer) and( Logitech Gaming Keyboard G510/ w/ Logitech G600 MMO Gaming Mouse) . Will 850watts be enough or to much? Thank you for taking the time to answer.