Dual-GPU with Dual-Monitor setup.

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moveit124

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Aug 19, 2015
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Why can I not connect one monitor to each GPU. Why do both have to be connected to the primary GPU? Is there any way to bypass this? I went out and bought a motherboard specifically made for this and a GPU as close as I could find to mine.

Currently these are my computer specs:
GA-990FX-GAMING Rev: 1.0
Gigabyte R9 290X - main graphics card
XFX R9 290 - secondary graphics card
FX-8320 overclock to 4.42GHz
2x 8GB PNY 1600MHz
HX850i Power Supply

Any reason that I couldn't do this?
 
Solution
photonboy


1) Crossfire requires all monitors be connected to the same graphics card if using them as a single "virtual" screen.

2) There's no advantage that I can think of though to using one GPU per monitor except when using a cheaper graphics card to drive a second, non-gaming monitor.

So...
I can't think of a good reason to change your setup...
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moveit124

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Aug 19, 2015
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What are the benefits of not having crossfire mode enabled?

Cause I bought two graphics cards for that specifically. To be able to get performance gains in video games that have high requirements. And so far some games I play have huge gains by having two graphics cards although it doesnt seem to be a constant gain.
 
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photonboy

photonboy

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Jun 20, 2006
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1) Crossfire requires all monitors be connected to the same graphics card if using them as a single "virtual" screen.

2) There's no advantage that I can think of though to using one GPU per monitor except when using a cheaper graphics card to drive a second, non-gaming monitor.

So...
I can't think of a good reason to change your setup regardless of whether you use both monitors as a single, virtual desktop or not. (it's also a bad idea with two monitors when gaming anyway since the gap is right in the middle of the virtual screen).
 
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Solution
photonboy

photonboy

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Jun 20, 2006
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Ah... makes sense.
I suspect you are using 2xCrossfire to drive one monitor only for gaming, and can drive the second, secondary monitor using the second GPU. I can't 100% confirm that but it's not hard to try.

You probably have to mess around with the AMD video control panel. I'd use CRIMSON if you aren't already.

Probably something like "Monitor #1 uses Crossfire" or something, and Monitor #2 is secondary.
 
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moveit124

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Aug 19, 2015
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When I connected my second monitor to my second GPU. My computer didnt even recognize that there was a monitor in that slot.
 
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