what's recommended wattage for my pc?and what's recommended psu?850w is enough?(i'm going to play ultra settings(1440p/4k)
CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
Motherboard: Gigabyte GA-Z97X-GAMING 7 ATX LGA1150 Motherboard
Memory: Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-1866 CL9
Storage: Sandisk Extreme II 240GB 2.5" Solid State Drive
Storage: Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: Crossfire Sapphire Radeon R9 290X 4GB Tri-x Video Card
Case: Cooler Master Storm Trooper ATX Full Tower Case
Optical Drive: Sony 5280S-CB-PLUS DVD/CD Writer
Operating System: Microsoft Windows 8.1 Pro(OEM) (64-bit)
CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
Motherboard: Gigabyte GA-Z97X-GAMING 7 ATX LGA1150 Motherboard
Memory: Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-1866 CL9
Storage: Sandisk Extreme II 240GB 2.5" Solid State Drive
Storage: Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: Crossfire Sapphire Radeon R9 290X 4GB Tri-x Video Card
Case: Cooler Master Storm Trooper ATX Full Tower Case
Optical Drive: Sony 5280S-CB-PLUS DVD/CD Writer
Operating System: Microsoft Windows 8.1 Pro(OEM) (64-bit)