Will the RM850 power this build, or do I need more?

[Grolthok]

Pretty much the title. I keep second guessing myself and looking at power supply calculators and can't figure out if I'm over thinking it or not.

Case: Fractal Design R2 XL

Mobo: Gigabyte GA-Z87X-UD5H (board SATA power plugged in)

Memory: Corsair XMS3 4x2GB (possible upgrade to 4x4 Dominator or Vengeance in the future)

GFX: 2x (SLI)Gigabyte GV-N770WF3-2GD GTX770 (may go with the GV-N770OC-2GD. Same price, but overclocked. Not sure on that yet)

CPU: Core i7 4770k

SSD (boot): Crucial 500M 120gb

HDD (storage): 1.5TB Seagate Barracuda 7200.11 ST31500341AS (may upgrade later to 2TB+)

Optical drive: Standard SATA DVD +-RW

Cpu Cooling: NZXT Kraken X60 (Possible Push/Pull setup using 2 more NZXT FX-140LB 140mm fans) (Fan controller SATA power connected)

Case Cooling: 3x 140mm Fractal Design FD-FAN-SSR2-140 (Replacing all fans with Rosewill ROCF-11003 Hyperborea's x7 when I can)

USB Devices: 1x Plantronics Gamecom780, Mouse, Keyboard, occasional charging ports, webcam as needed for streams, etc.

It just seems to me that 850w is just low. Or maybe I'm overestimating things.

 

[Drew010]

The RM850 will power that build just fine, and with some room to spare. It's a great PSU, I love mine!

 

[Darth Rache]

Yea I'm running two EVGA 780 Super Clocked cards and a 4670k on on and at load my killawatt says I'm only using 460watts. So you are golden.