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Crossfire + eyefinity screen tearing

Last response: in Graphics & Displays
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March 18, 2014 7:17:50 AM

I have massive screen tearing with my 2 7870 crossfire eyefinity setup. Connections are 1 hdmi 1 mini display port to active hdmi adapter and 1 dvi. I'm using the newest beta drivers. Vsync enabled. Games like diablo have massive tearing across all screens. I was thinking on getting another hdmi active adapter to replace the dvi. Any help would be great!
March 18, 2014 8:24:53 AM

you need to run all the screens from mst hubs.
i had this issue with my 2x 7950's and 4 screens. i was running everything from its own output.

i got 2 http://www.memoryexpress.com/Products/MX49358 ran everything from my display ports and the issue cleared right up.

evga and accell have 3 port ones
http://www.memoryexpress.com/Products/MX50007
http://www.memoryexpress.com/Products/MX50768

it just took throwing money at the right cables, loving the ghetto 4k res though.

fx 8350
gigabyte 990fxa ud7
16g gskill 1600
600g assorted ssd 5tb hdd mixxed
2x h.i.s. 7950(flashed to 7970)
corsair ax 860 psu
thermaltake water2.0 extreme
thermaltake level 10 snow
4x asus ve278q
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March 18, 2014 8:28:34 AM

apparently they cleaned up the issue between mixing vid outputs on the r series, the 7xxx series needs the screens running from the same type output, the mst hub should get you 3 good screens from it.
i can't remember if the 7870's have 1 or 2 display port hubs.

I have run 6 screen but i get the tearing on the 2 screens not on the hubs.
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March 18, 2014 10:10:24 AM

What's a good hub that doesn't break the bank. I would just use the active adapters on hub also, correct? My monitors don't have any display ports.
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March 18, 2014 10:30:18 AM

Thestabu said:
What's a good hub that doesn't break the bank. I would just use the active adapters on hub also, correct?


I'm using the displayport to hdmi ones, 2 mst hubs to 4 hdmi cables.
the hubs just started hitting the market here a few months ago, i think i paid 80 each for mine. i got the first one that hit the store, if i had waited 2 weeks i'd have the 3 port evga ones.
i'm pretty happy with mine though.

the only thing i noticed is that it takes a min or 2 to warm up when i start up. the screens blink on and off a little but once it settles down it works great. usually by the time i get past the wow login its sorted out and stable.
the one i use treats each pair off monitors as one 3840x1080 screen.
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March 18, 2014 10:41:37 AM

Just to make sure. You're using active display adapter to hdmi in the mst to hub? I would have to buy 3 of these http://www.accellcables.com/B086B-003B-2.html and then the mst hub. I just don't know if the adapter would cause problems.
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March 18, 2014 10:56:15 AM

no, its the mst hub plugged into the display ports, then 4 of the cheapest hdmi cables i could find plugged into the hub.
i just went with the least connectors possible.

i am not sure what you would need to go from the display port output hubs to your monitors.
this is where google comes in handy, hit the spec page for the hubs, and they should tell you what you need for your particular setup.
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March 18, 2014 11:01:16 AM

the hubs i have are straight dp to 2 hdmi outputs, so i don't need the adapters.
but it looks like you will evga has a forum page for their adaptor, if you are looking at that one you might want to head over there and ask.
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March 18, 2014 11:02:56 AM

My problem is the mst hubs output to display port 1.1 or 1.2. I only have have 2 1.2 display ports 1 dvi and 1 hdmi on the main video card. My monitors don't have any display ports. Not use how well a display port cable to hdmi would work. Sorry for all the trouble.
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March 18, 2014 11:29:41 AM

my cards have only 2 dp ports, i have a hub on both.
the startech DisplayPort to Dual HDMI Multi Monitor Adapter M/F - DP to 2x HDMI 3840x1200 is the one i got.
running 3 monitors you should be good with 1 of the hubs i got, and 1 dp to hdmi, if all your monitors have hdmi.
one of your dp ports on your card would run 2 monitors through the hub, the other dp should run the third monitor with the adaptor you linked.
the hub i got acts as both the mst splitter, and the dp to hdmi output in 1 box.

you want to run all your monitors out of the display ports. i don't think the transition of 1.2 input to 1.1 output on the hub matters much.

if you went with the 2 hdmi output one i went with, then added a displayport to hdmi on the other dp on your card i think it would work quite well.


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March 18, 2014 12:08:49 PM

Thank you for all you help!
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March 18, 2014 12:27:04 PM

i hope it does help.
i was tearing my hair out when i first tried to figure it out myself.
lets just say that the hubs cost less then all the cables and adaptors i had bought before to try to fix the issue.

the one i got was pretty much plug and play for me, my card reads each hub as 1 3820x1080 screen.
the only thing i had to do was flip the top pair upside down in the settings, i run my top 2 monitors upside down for the slightly smaller bezels.
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!