How to achieve a 3-monitor setup

I know, I know...there are a million explanations for this out there, but none of them feel like they really address my questions, so please forgive my ignorance in advance :). I want to have 3 monitors on my desktop computer that I use for gaming. I am currently using a NVIDIA GeForce GTX 580 as my GPU. This card is no longer made, so I can't buy another one to link in SLI, so I'm stuck finding another card (or cards) to use. Right now I'm looking at getting 2x Radeon HD 7790 2GB in SLI for my 3-monitor setup, but here is the question I have: Is this the most economically friendly way to achieve a 3-monitor setup? Will these two cards in SLI give me as much GPU power as my current single card? Please explain to me EVERYTHING I will need to achieve this so that I won't have any surprises once I start buying hardware. Here is my current computer setup:

Windows 7 64-bit OS
Intel i7-2600K @ 3.40GHz processor
NVIDIA GeForce GTX 580 Video Card

5 answers Last reply Best Answer
More about achieve monitor setup
  1. The 7790 can handle 3 monitors. But if you want to do surround, you will want a higher end card.
  2. Best answer
    Dont bother spending the money to crossfire those. Grab an R9 270x. It will be cheaper than two 7790's. All you need is your 3 monitors to be able to plug into the back of the card(ie 2 DVI and 1 hdmi monitor or vice versa)
  3. eg gtx780 or r9 290

    The 580 only has 2 ports - mini hdmi and dvi. So SLI won't help - they have to run off the primary card. A 680 would be OK (4 ports) or even 670 (also 4 ports). But for 3 1080p monitors all gaming you need more than 2gb vram.
  4. If you will game on one monitor and use the other two as side monitors, that is one thing.
    Just buy a cheap second card to attach the other two(non sli)

    If you want to game on triple monitors with decent frame rates, that is another whole ball game.
    3 x 1920 x 1080 is a lot more pixels for the graphics to manage.
    A single card like a GTX780ti would do it, or a R9-290X perhaps.
    Really, though, you would be looking at sli with two GTX770 class cards.
  5. Thank you all for your responses. I'm really looking for a more economical way to do this, rather than an amaze-balls graphic setup. While another $600+ card would be fun, I think I'm going to try the cheaper option.

    EDIT: Ahhh, I think I'm starting to see...I'm going to get stuck having to buy a $600 card because I don't just want 3 monitors...I want to stretch my games across all three. Surround, as one person mentioned. Ugh...guess I'll be saving for a while...
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