Is it possible to connect two different grapics cards?

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ril2

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Apr 21, 2013
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Iv'e got alot of graphics cards laying around in my house which I can't sold. I connected two screen monitors to my computer and I want to know if its possible to just add another graphics card sonehow and connect each monitor to a card? (Without SLI. Because they are different)...

Thanks in advance!
 
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Janpieter Sollie

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Jun 2, 2013
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technically, yes, but your drivers have to support it.
it is not recommended, for example, to have an active nvidia and amd gpu running at the same time.
also, 2 different gpus won't be able to share the workload in many applications (such as games): main calculations will just be done on the first one, the second one will just display everything
so, unless you are sure your program can handle multiple gpus, just stay at one, it will save you the $ of electricity
 
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ril2

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Apr 21, 2013
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I'm using a software which allows me to use my computer with 2 users at the same time, one in each monitor, so if two people are using my computer and playing games, the video card will not be able to handle it...
Should I use a pci-e to pci adapter?
 
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Janpieter Sollie

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Jun 2, 2013
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I don't say it can't I just say it's not recommended: you can get into trouble with IRQ conflicts, wrong dll function calls etc.
Does that even exist, a pci-e to pci adapter? it's a total different way of communicating (the difference is actually as big as SCSI vs IDE), I didn't know there were actually adapters for that :-/
 
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Mousemonkey

Mousemonkey

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Sep 3, 2006
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Really? What cards and OS were you using when you saw that?
 
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ril2

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Apr 21, 2013
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So.... Should I?
 
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Janpieter Sollie

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Jun 2, 2013
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the IRQ conflict will be handled by IRQ sharing, I know, it's just easier when it can be handled at driver level instead of at kernel level.
But yes, on win XP pro I actually encountered situations where I intended to run openCL calculations on the amd card, but which were forwarded to the (active) nvidia card in the system due to dll link errors
 
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Mousemonkey

Mousemonkey

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Sep 3, 2006
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No reason why not, the other poster is talking about issues that were sorted out long ago when AMD cards were rubbish at OpenCL but now they are supposed to be the best things for OpenCL so that problem is obviously fixed.
 
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