Will my power supply be okay with this setup?

[SLE7ENN]

Hello, I have a machine that I'm looking to upgrade Specifically the GPU's. The upgrade will be either 2 Nvidia Evga GTX 780 Ti's or 2 Nvidia Evga Titan Blacks I will leave a list of parts that I'm currently using below




CASE: Thermaltake Chaser MK-1 Full Tower Gaming Case W/ Side Panel Window

Disk: LG 14X Internal Blu-ray Burner, BD-RE, DVD+RW, 3D Playback

CPU: Intel(R) Core™ i7-3820 Quad-Core 3.60 GHz 10MB Intel Smart Cache LGA2011

Fans: Two Maximum Enermax 120MM Case Cooling Fans with Blue LED, also Four 200mm Blue LED Fans

Cooling: Thermaltake Water 2.0 Pro Liquid Cooling System 120MM Radiator Single

HDDS1-2: Two 240GB Corsair Force GS Series SATA-III 6.0Gb/s SSD - 555MB/s Read & 525MB/s Write

HDD3: 1TB Western Digital Caviar Black SATA-III 6.0Gb/s 7200 RPM HDD

MEMORY: 16GB (4GBx4) DDR3/1866MHz Quad Channel Memory (Corsair Vengeance

MOTHERBOARD: (4-Way SLI/CrossFireX Support) ASUS Rampage IV Extreme Intel X79 Chipset Quad Channel DDR3 ATX w/ ROG Connect, BT GO, OC Key, Subzero Sense & 7.1 HD Audio, Intel GbLAN, 5 Gen3 PCIe X16 & 1 PCIe X1


POWERSUPPLY: * 850 Watts - Corsair CMPSU-850TXV2 80 Plus Power Supply - Quad SLI Ready



My current GPU's are as followed

Two NVIDIA GeForce GTX 670 2GB 16X PCIe 3.0 Video Card (EVGA FTW Edition) Sli

-Thanks in advance!

 

[4745454b]

OCing? You are fine for stock. OCing might be pushing it.

 

[plaintuts]

yeah its fine.

 

[SLE7ENN]

OCing? You are fine for stock. OCing might be pushing it.

That was fast. No over clocking. Is my currently power supply "enough" for two Titan Blacks or is it more than "enough".

I'm new to the whole Building thing so bare w/me. I almost want to get a 1000W power supply just to get some more build expierence but if I don't need to then hey more money saved. I'm guessing Titan Blacks use more power the 780 Ti's? The Evga detail sheet doesn't really clarify, it just says 600w min

 

[4745454b]

Should be more then enough. The blacks are 250W cards. So two will be 500W. The CPU is a 125W? Even with the rest of the system you are looking at a less then 700W draw. That Corsair 850W shouldn't have a problem with that at all.