GTX780 Ti SC SLI & Compatible PSU

[Chlippry]

Hey everyone,

I'm looking to add a second EVGA GTX780Ti Superclocked GPU to my system towards the end of the year. Current system specs are:

 

Mobo - AsRock Z87 Extreme6

CPU - i7-4770k (no overclock, but would like to at some stage)

CPU Cooler - Corsair H100i with 4x120mm fans push/pull

RAM - G.Skill 2x4gig 1600

GPU - 1 x EVGA GTX780Ti Superclocked (no overclock and probably wont be)

HDD - 1 x WD Black 1tb

SSD - 1 x OCZ vertex 3 120gig & 1 x Sandisk Extreme 240gig

Case fans - 4x230mm fans & 1x140mm fan

PSU - Cooler Master Silent Pro M850watt 80+ Bronze (Based in Australia with 240volts running through the wall sockets I'm pretty sure)

 

I've ran through numerous different Power wattage calculators and keep coming up around the 670-750watt range and the calculator in the first page of this thread has provided an estimation of 690watts at 90% and 761watts at 100%. I'm pretty sure I will need to upgrade my PSU when adding a second card but would love if I could get confirmation if that will be required or if my current Cooler Master will be sufficient. If I do upgrade I am deciding between the EVGA P2 1000watt Platinum or the Corsair AX1200i Platinum which I believe both to be exceptional pieces. If someone can shed some light on this subject I would greatly appreciate it! 

[jaffacakes]

 

Hey everyone,

I'm looking to add a second EVGA GTX780Ti Superclocked GPU to my system towards the end of the year. Current system specs are:

 

Mobo - AsRock Z87 Extreme6

CPU - i7-4770k (no overclock, but would like to at some stage)

CPU Cooler - Corsair H100i with 4x120mm fans push/pull

RAM - G.Skill 2x4gig 1600

GPU - 1 x EVGA GTX780Ti Superclocked (no overclock and probably wont be)

HDD - 1 x WD Black 1tb

SSD - 1 x OCZ vertex 3 120gig & 1 x Sandisk Extreme 240gig

Case fans - 4x230mm fans & 1x140mm fan

PSU - Cooler Master Silent Pro M850watt 80+ Bronze (Based in Australia with 240volts running through the wall sockets I'm pretty sure)

 

I've ran through numerous different Power wattage calculators and keep coming up around the 670-750watt range and the calculator in the first page of this thread has provided an estimation of 690watts at 90% and 761watts at 100%. I'm pretty sure I will need to upgrade my PSU when adding a second card but would love if I could get confirmation if that will be required or if my current Cooler Master will be sufficient. If I do upgrade I am deciding between the EVGA P2 1000watt Platinum or the Corsair AX1200i Platinum which I believe both to be exceptional pieces. If someone can shed some light on this subject I would greatly appreciate it! 

 

The PSU should be good enough and your system will rarely go to 100%. 

[JoshM]

Your current psu will be sufficient 

[Faceman]

@Chlippry

 

Even for two video cards, 850W is more than enough.

 

Check out the EVGA SuperNOVA 850 G2.  Currently at the insanely low price of $99 in the U.S.

 

It is fully modular, 10 year warranty, and <50% load = zero fan noise, and of course, gold rated.

 

Johnny Guru gave it a 9.9/10

[-rascal-]

You don't need to upgrade your PSU. Your existing 850W is plenty -- even if you decide to further overclock your GTX 780 Ti SC's and your i7-4770K.

[Chlippry]

excellent! thanks everyone. My tax return was done today and it wasnt as high as the last few yrs so not having to upgrade my psu is a plus! Faceman, thanks for the link to the EVGA, but Im in Australia not sure what the shipping fees would be but i'll hold off for now, thanks anyway.