Sign in with
Sign up | Sign in
Your question
Solved

Is 850w large enough to run 2 gtx 780 ti's in SLI?

Tags:
  • SLI
  • Components
  • Power Supplies
Last response: in Components
Share
February 2, 2014 12:24:51 PM

I'm starting with 1 of these cards and am going to wait to SLI it until later, but want to get ahead of the game and get a big enough power supply for both. I plan on running 4 monitors possibly 6 later when I SLI them. So my main question is if the 850 w bronze corsair PSU is enough to run both cards and this system below? Any other comments are appreciated, thank you!

PCPartPicker part list: http://pcpartpicker.com/p/2M2fR
Price breakdown by merchant: http://pcpartpicker.com/p/2M2fR/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2M2fR/benchmarks/

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($229.97 @ SuperBiiz)
CPU Cooler: Noctua NH-D14 65.0 CFM CPU Cooler ($59.99 @ NCIX US)
Motherboard: ASRock Z87 Extreme6 ATX LGA1150 Motherboard ($168.49 @ Newegg)
Memory: Crucial Ballistix Sport 16GB (2 x 8GB) DDR3-1600 Memory ($139.99 @ Microcenter)
Storage: Samsung 840 Pro Series 256GB 2.5" Solid State Disk ($227.95 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.66 @ OutletPC)
Video Card: EVGA GeForce GTX 780 Ti 3GB Video Card (2-Way SLI) ($717.55 @ Newegg)
Video Card: EVGA GeForce GTX 780 Ti 3GB Video Card (2-Way SLI) ($717.55 @ Newegg)
Case: Fractal Design Define R4 (Black Pearl) ATX Mid Tower Case ($88.98 @ Newegg)
Case Fan: Noctua NF-A14 PWM 82.5 CFM 140mm Fan ($20.53 @ NCIX US)
Case Fan: Noctua NF-A14 PWM 82.5 CFM 140mm Fan ($20.53 @ NCIX US)
Case Fan: Noctua NF-A14 PWM 82.5 CFM 140mm Fan ($20.53 @ NCIX US)
Power Supply: Corsair Enthusiast 850W 80+ Bronze Certified Semi-Modular ATX Power Supply ($114.99 @ Newegg)
Operating System: Microsoft Windows 8 (OEM) (64-bit)
Monitor: Asus VH236H 23.0" Monitor ($149.48 @ Newegg)
Monitor: Asus VG248QE 144Hz 24.0" Monitor ($263.98 @ Best Buy)
Monitor: Asus VG248QE 144Hz 24.0" Monitor ($263.98 @ Best Buy)
Monitor: Asus VG248QE 144Hz 24.0" Monitor ($263.98 @ Best Buy)
Other: 3x Dual LCD Monitor Desk Stand/Mount Free Standing, Holds Vertical 2 Screens up to 27" ~ (by VIVO) ($218.97)
Total: $3747.10
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-02 15:23 EST-0500)

More about : 850w large run gtx 780 sli

a b ) Power supply
February 2, 2014 12:33:09 PM

I wouldn't but it is possible to do it. Especially when you through an overclock on your CPU and gpus and everything. Plus PSUs run most efficiently and last longest when they aren't running near their max output. Also I would look into a higher efficiency rating as well but 80+ bronze is ok too
m
0
l
February 2, 2014 12:37:13 PM

Jameson Clark said:
I wouldn't but it is possible to do it. Especially when you through an overclock on your CPU and gpus and everything. Plus PSUs run most efficiently and last longest when they aren't running near their max output. Also I would look into a higher efficiency rating as well but 80+ bronze is ok too


Thanks for chiming in, you certainly know more than me would you mind recommending one? Maybe something more powerful and efficient while trying to manage cost?
m
0
l
Related resources
a c 166 ) Power supply
February 2, 2014 12:53:43 PM

Personally, I would would have no issue running 2 x 780ti on that Corsair 850W PSU if you are talking this model: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
The GTX 780ti is a 250W card (20.8 amp @ +12V). Nvidia recommends a 600W PSU for one card. From my experience with SLI and CF over the years, the 2nd card will rarely if ever run 100%.
m
0
l
February 2, 2014 12:55:02 PM

clutchc said:
Personally, I would would have no issue running 2 x 780ti on that Corsair 850W PSU if you are talking this model: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
The GTX 780ti is a 250W card (20.8 amp @ +12V). Nvidia recommends a 600W PSU for one card. From my experience with SLI and CF over the years, the 2nd card will rarely if ever run 100%.


Maybe I should take a step up just to be safe? Suggestions?
m
0
l
a c 166 ) Power supply
February 2, 2014 12:58:49 PM

answertime said:
clutchc said:
Personally, I would would have no issue running 2 x 780ti on that Corsair 850W PSU if you are talking this model: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
The GTX 780ti is a 250W card (20.8 amp @ +12V). Nvidia recommends a 600W PSU for one card. From my experience with SLI and CF over the years, the 2nd card will rarely if ever run 100%.


Maybe I should take a step up just to be safe? Suggestions?


Go with a 1000W Corsair, then.
m
0
l

Best solution

a b ) Power supply
February 2, 2014 1:02:12 PM

Well price is the hard part. If you bump up to 1000W and stay with reputable brands there is a large price increase.
http://pcpartpicker.com/parts/power-supply/#w=1000&sort...

What I can recommend though is a higher efficiency rating at your current price and wattage.
http://pcpartpicker.com/part/xfx-power-supply-p1850bbef...
http://pcpartpicker.com/part/corsair-power-supply-rm850
Share
February 2, 2014 1:11:50 PM

Jameson Clark said:
Well price is the hard part. If you bump up to 1000W and stay with reputable brands there is a large price increase.
http://pcpartpicker.com/parts/power-supply/#w=1000&sort...

What I can recommend though is a higher efficiency rating at your current price and wattage.
http://pcpartpicker.com/part/xfx-power-supply-p1850bbef...
http://pcpartpicker.com/part/corsair-power-supply-rm850


http://pcpartpicker.com/part/corsair-power-supply-rm100...
I think that 1000w corsair is a good one. I happen to have some best buy gift cards so that's perfect. Was looking to buy some of it there.
So if I'm only using like 600-650 watts for the time being, its not a huge waste of electricity right? I think I read that was a myth.

Thanks
m
0
l
a c 2469 ) Power supply
February 2, 2014 1:16:09 PM

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: EVGA SuperNOVA 1000G2 1000W 80+ Gold Certified Fully-Modular ATX Power Supply ($175.98 @ SuperBiiz)
Total: $175.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-02 16:15 EST-0500)


Tier 1 Brands - The Most Powerful And Stable Components On The Market.

Antec Signature
Antec High Current Pro -1200w
Antec HCP Platinum 1kW
Cooler Master V series 700, 850, 1kW
Corsair AX
Enermax Galaxy
Enermax Revolution
EVGA SuperNova G2 1000W and 1300W
Kingwin Lazer Platinum
PCP&C TurboCool
PCP&C Silencer Greater than 610 watt
Sapphire Pure
Seasonic X-Series
Seasonic S12D/M12D
Silverstone ZF (Etasis 85/75/56)
Seventeam ST Greater than 600w (SSI, V2.91)
Silverstone OP/DA Greater than 700 watt
Silverstone ZM
Ultra X3 Greater than 1000 watt
XFX Black Edition
XFX XXX Edition
Zippy/Emacs SSL
Zippy/Emacs GSM
Zippy/Emacs PSL
Zippy/Emacs HG2
Zippy/Emacs HP2
m
0
l
a b ) Power supply
February 2, 2014 1:18:44 PM

Your psu will only draw the electricity it needs, plus with the higher efficiency rating it will take less to get the necessary wattage than your original build
m
0
l
!