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Hi, |
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|
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On Sun, 05 Jun 2016 19:34:15 +0200 lee wrote: |
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> Hi, |
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> |
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> is there a way to reasonably use two graphics cards with a single |
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> display? |
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> |
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> SLI won't work because it's retarded in requiring the GPUs to be the |
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> same, which they aren't --- not to mention that the cards would be too |
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> far away from each other in the slots for a bridge to fit. |
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> |
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> So what I'm thinking of is like using one card as a default and being |
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> able to use the other one to play a video in some window on the same |
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> display, preferably managed by the same fvwm, with the window optionally |
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> being fullscreen in size. I'd like to do that because the card I have |
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> isn't powerful enough to play a video while an open gl application is |
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> running at the same time. |
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> |
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> I'll probably get a better card once prices come down a bit, but it |
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> might have the same problem, and why would I want to waste an otherwise |
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> perfectly good graphics card. |
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|
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Yes, but it depends on your hardware setup. What's yours and why |
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you need such unusual thing: connect two video cards to a single |
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monitor, or do you mean by display X display spawn over multiple |
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monitors? |
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|
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In case of laptops such configuration is quite common: they may |
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have two video cards with single switchable output: intel card is |
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used for general work to save power and nvidia card is used for |
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applications, requiring high GPU performance. Switching is done |
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using sys-power/bbswitch. But looks like this is not your case, |
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since you are talking about card replacement, since most laptop GPU |
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cards are not replaceable. |
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|
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If you want a multihead setup using two cards, this is trivial using |
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either xinerama or X screens depending on your taste. |
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|
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As far as I understand your e-mail, you are trying to mux video |
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outputs of two GPU cards to a single monitor (excuse me if I'm |
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wrong, but it is hard to understand what your hardware is), this is |
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also doable if your monitor supports dual input (most modern |
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monitors do). This way separate X screens may be used to achive |
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your goal. (Xinerama setup is also possible, but GL acceleration |
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will be limited to abilities of the weakest card). |
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|
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But honestly I don't get why you need this: if you have a powerful |
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GPU and it is not a laptop, where power consumption is critical, |
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why just don't use that card? Most cards have multiple outputs, so |
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it is not a problem to setup multihead with a single card either. |
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|
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Best regards, |
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Andrew Savchenko |
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