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280x Crossfire with 850w?

xepherstones
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I'm about to upgrade from my old 660, to a pair of r9 280x's (Gigabyte Windforce cards, to be exact) And right now I have an 850w power supply, 80+ Gold. Would I need to upgrade to a 1000w supply, or would I be okay? This system is also running with one SSD, one HDD, and a 4770k overclocked to 4.3ghz. 

CONFIG: i7 4770k (h80i, 4.3ghz), Gigabyte z87x-UD4H, 2x AMD R9 280x (GIGABYTE Windforce), Samsung 840 EVO 250gb, Segate 2tn, RM850 PSU

INPUT DEVICES: Rosewill IK-90001, Logitech G602,. ASUS VS248, ASUS PB238

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Just for reference, I'm using a 750W for two 780s and an OCd 4670k.

Case: Corsair 4000D Airflow; Motherboard: MSI ZZ490 Gaming Edge; CPU: i7 10700K @ 5.1GHz; Cooler: Noctua NHD15S Chromax; RAM: Corsair LPX DDR4 32GB 3200MHz; Graphics Card: Asus RTX 3080 TUF; Power: EVGA SuperNova 750G2; Storage: 2 x Seagate Barracuda 1TB; Crucial M500 240GB & MX100 512GB; Keyboard: Logitech G710+; Mouse: Logitech G502; Headphones / Amp: HiFiMan Sundara / Mayflower Objective 2; Monitor: Asus VG27AQ

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A 750 WATT would be enough but i would recommend 850 watt becuze future cards

[spoiler= Dream machine (There is also a buildlog)]

Case: Phanteks Enthoo Luxe - CPU: I7 5820k @4.4 ghz 1.225vcore - GPU: 2x Asus GTX 970 Strix edition - Mainboard: Asus X99-S - RAM: HyperX predator 4x4 2133 mhz - HDD: Seagate barracuda 2 TB 7200 rpm - SSD: Samsung 850 EVO 500 GB SSD - PSU: Corsair HX1000i - Case fans: 3x Noctua PPC 140mm - Radiator fans: 3x Noctua PPC 120 mm - CPU cooler: Fractal design Kelvin S36 together with Noctua PPCs - Keyboard: Corsair K70 RGB Cherry gaming keyboard - mouse: Steelseries sensei raw - Headset: Kingston HyperX Cloud - Build Log

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850W is plenty, but why 2 280xs?

Holy crap, you guys are fast. Dual 280x's because I found one for a good price a few days back, and decided to chip in an extra 300 bucks on top of that for awesome performance. Plus, I needed lots of OpenCL. 

CONFIG: i7 4770k (h80i, 4.3ghz), Gigabyte z87x-UD4H, 2x AMD R9 280x (GIGABYTE Windforce), Samsung 840 EVO 250gb, Segate 2tn, RM850 PSU

INPUT DEVICES: Rosewill IK-90001, Logitech G602,. ASUS VS248, ASUS PB238

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Just for reference, I'm using a 750W for two 780s and an OCd 4670k.

...Well then. Guess I'm good. 

CONFIG: i7 4770k (h80i, 4.3ghz), Gigabyte z87x-UD4H, 2x AMD R9 280x (GIGABYTE Windforce), Samsung 840 EVO 250gb, Segate 2tn, RM850 PSU

INPUT DEVICES: Rosewill IK-90001, Logitech G602,. ASUS VS248, ASUS PB238

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No, 850 is Plenty.

Emma blackberry?

CONFIG: i7 4770k (h80i, 4.3ghz), Gigabyte z87x-UD4H, 2x AMD R9 280x (GIGABYTE Windforce), Samsung 840 EVO 250gb, Segate 2tn, RM850 PSU

INPUT DEVICES: Rosewill IK-90001, Logitech G602,. ASUS VS248, ASUS PB238

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Thumbs up to what has been said, you will be fine

There are 10 types of people in the world: Those who understand binary, and those who don't.

Just some helpful stuff: You're - You are, Your - Your car, They're - They are, Their - Their car, There - Over there.

 

Folding @ Home Install Guide and Links | My Build

 

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