Multiple Graphics Cards

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  • Updated 4 years ago
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Apologies in advance...this is not a Flex problem at all, but something I suspect resident experts might be able to help with...

I have 2 monitors and 2 AMD graphics cards:  a newish 2Gb R9 200 series running at 2560 x 1440 (DisplayPort) to my main monitor and an older HD 4800 series running a second monitor at 1920 x 1080 (the monitor’s maximum capability - DVI). Windows 8.1 Pro 64 bit. 8Gb RAM.

I have no doubt that there is a conflict between the 2 graphics drivers.  If I load the HD4800 driver I have a workable system but this takes a huge hit on the CPU %, often reaching 100%, even with only a few other apps running.  Load a pages on Chrome, for example, and everything drags to a snail’s pace.

If I load the R9 200 driver, the HD4800 card doesn’t display at all.  At present, just to have a workable system I’m using the HD4800 driver, and as expected the Windows Device Manager shows a problem with the R9 200 card.  It works but only just.

Is the solution to buy a second R9 200 series card (using the same driver) and/or upgrade my second monitor to one with 2460 x 1440 capability? Is there a better solution?

AMD’s technical support started off very enthusiastically, but when it came to the crunch it seems they’ve just dropped the case...hmmm.

Obviously I want to minimise my expenditure, but if the only way is to lash out loads of dosh on another new monitor and graphics card I guess I’ll have to.  I’d appreciate any advice please.

Jeff – G4IUA

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Jeff - G4IUA

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Posted 4 years ago

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Photo of Jeff - G4IUA

Jeff - G4IUA

  • 116 Posts
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Official Response
Wow!  What a difference this has made!  Removing the older HD4800 card, completely removing all the AMD drivers, reloading them, several reboots later and it seems to be working exactly as I want!  

Before, the CPU usage was ridiculously high (with just one slice open plus a few other apps) and now the combination of JT65, Log4OM, JTAlert, Chrome (several pages open) still only results in the CPU idling over at around 20%.  And everything is so much more responsive!

Many thanks for all the suggestions.  I think the moral of the story is to look after the graphics card/s - I really didn't realise how much of an impact they have on the overall performance.  I thought a graphics card could only output at one resolution, but seeing is believing...I've checked and rechecked but there it is - 2 monitors side by side and 2 resolutions from the one card. Everyone's happy! 

(I must make a small confession here; in a small way I was thinking how great it would be forced to have to buy another brand spanking new 2560 x 1440 monitor).  Oh well.  It would have been an overindulgence I know!

Thanks to all

Jeff - G4IUA