Debating pros/cons regarding cost differences between GTX 780 and GTX 780 Ti in SLI

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finngrace

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Jun 9, 2013
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I apologize for the copypasta below this. I am going to be upgrading my SLI system to something beefier to handle my Nvidia Surround setup at 5760*1080. I'm debating whether or not it's worth spending an extra $400 for two GTX 780 Ti's vs two GTX 780s. I am however unsure if my power supply is up to the task of handling either of these solutions however, and if I have to upgrade my PSU, I'll have to chuck the GTX 780 Ti SLI idea to the side and settle with the GTX 780s.

I would like to ask in advance that your answers be fully thought through and that you use proper grammar.



Approximate Purchase Date: Late February or early March.

Budget Range: $1400 before rebates

Typical usage: Heavy gaming, word processing and web browsing.

Current GPU and PSU: MSI Nvidia GTX 660 Ti Power Edition in 2-way SLI configuration, Corsair AX 860i

Relevant System Specifications:

  • CPU: AMD FX-8350 stock clocks
    RAM: 2x 4GB Corsair Vengeance LP 1600MHz @ 1333MHz, 2x 2GB Corsair Vengeance 1600MHz @ 1333MHz
    Mobo: Gigabyte GA-990XA-UD3

Preferred Parts Distributor: Newegg.com

Part Preferences: Specifically EVGA, using Nvidia's reference cooler (I like it for the 'bling' factor)

Overclocking: No / Maybe

SLI: Yes

Monitor Resolution: 5760*1080
 
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jimmysmitty
I would say it is enough but since you are running a FX-8350 and those are known to use more power than the Intel equivalent, I wouldn't risk it. I would push for a AX1200i just to have that safety net in case.

If you were running say a 4770K, then it would probably be fine to run the 780Tis in SLI with that PSU.

I wouldn't say it is a bad thing either. The performance difference wont be enough to truly be sad over:

http://www.guru3d.com/articles_pages/gtx_780_ti_sli_geforce_review,13.html

Just a few FPS, so not really worth the extra $150ish per GPU.
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jimmysmitty

jimmysmitty

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Oct 5, 2007
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I would say it is enough but since you are running a FX-8350 and those are known to use more power than the Intel equivalent, I wouldn't risk it. I would push for a AX1200i just to have that safety net in case.

If you were running say a 4770K, then it would probably be fine to run the 780Tis in SLI with that PSU.

I wouldn't say it is a bad thing either. The performance difference wont be enough to truly be sad over:

http://www.guru3d.com/articles_pages/gtx_780_ti_sli_geforce_review,13.html

Just a few FPS, so not really worth the extra $150ish per GPU.
 
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HiTechObsessed

HiTechObsessed

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I agree on the performance difference isn't enough, in my opinion, to justify it, but the 780 Tis would last longer.

About the PSU though, 860w is plenty as long as it's a good quality PSU, which the AX series is. See this:

http://www.guru3d.com/articles_pages/gtx_780_ti_sli_geforce_review,4.html

At full system load, 780 Tis in SLI pull 617w. Even accounting for AMD's more power hungry card, you're still well within the limits for a quality 860w PSU.
 
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jimmysmitty

jimmysmitty

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I don't think the Ti will last much longer because it only increase the shader count, not the memory which is more important to increasing resolutions and AA at said resolutions.

If it had more and faster VRAM I would agree.

As for the PSU, I would still say it is better to have the extra room as it will allow the PSU to keep lower loads, lower temps and last longer.
 
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finngrace

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At this point, I'm debating whether or not I should wait for the first wave of Maxwell cards to appear seeing as we're on the brink of it.
 
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jimmysmitty

jimmysmitty

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I have heard Maxwell on 20nm, where the real benefits will be, is Q4 2014 so if you want to wait till end of the year that is up to you.
 
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