Corsair 750W 80+ Will run 2 GTX 780Ti?

Leonardo Pucino · Mar 26, 2014

I'm thinking to upgrade my current system with a second 780Ti.
The question is, will the PSU (Corsair CX750M) be enough to run both?

Here is the complete build:
http://pcpartpicker.com/user/LeonardoPucino/saved/4aV8

The estimated wattage for two Ti's, according to PCPP, is 712w.

Thanks for any help.

swegname · Mar 26, 2014

750 is not enough for sli ti. Maybe try 850 or 1000.

rolli59 · Mar 26, 2014

Here is total system load measured http://www.anandtech.com/show/7492/the-geforce-gtx-780-ti-review/15 showing that your somewhat quality 750watts is enough since max under stress test is 652watts!

STACKS ON DECK · Mar 26, 2014

cx series is not good rated for its performance and build . . system with 2 780ti will require 700w in total so buy a good gold rated PSU like ax760

HiTechObsessed · Mar 26, 2014

Gold rated means nothing for normal users. 750w is enough power, even for an overclocked full load system, but the CX series is not for this kind of situation. I would still go for 850w for longevity, and you definitely want to get a high quality power supply at this budget and level of performance

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: Antec HCG M 850W 80+ Bronze Certified Semi-Modular ATX Power Supply ($121.99 @ Mwave)
Total: $121.99
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-26 12:27 EDT-0400)

g-unit1111 · Mar 26, 2014

swegname :

You can run 780TI SLI on 750W, but the capacitors on the Corsair CX series are very poorly made and won't handle the output loads required by the SLI configuration. This would be a much better use of $2K IMO:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($234.98 @ SuperBiiz)
CPU Cooler: Cooler Master Eisberg 240L Prestige 60.2 CFM Liquid CPU Cooler ($169.99 @ Amazon)
Motherboard: ASRock Z87 Extreme6 ATX LGA1150 Motherboard ($158.49 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory ($84.99 @ Newegg)
Storage: Samsung 840 Pro Series 128GB 2.5" Solid State Disk ($118.99 @ Best Buy)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ Amazon)
Video Card: Gigabyte GeForce GTX 780 Ti 3GB Video Card ($699.99 @ Newegg)
Case: Fractal Design Define R4 w/Window (Titanium Grey) ATX Mid Tower Case ($121.98 @ Amazon)
Power Supply: NZXT HALE90 V2 850W 80+ Gold Certified Fully-Modular ATX Power Supply ($168.99 @ SuperBiiz)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($23.52 @ NCIX US)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($84.99 @ NCIX US)
Total: $1901.90
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-26 12:40 EDT-0400)

rolli59 · Mar 26, 2014

Well OP is asking if he can add another 780Ti to his current build that he linked previously as far as I can tell from the original post! He is not buying a new build.

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