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| 7970 Lightning 3 Displayport Nightmare http://www.wsgf.org/phpBB3/viewtopic.php?f=66&t=26282 |
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| Author: | hishutzi [ 09 Jun 2013, 18:15 ] |
| Post subject: | 7970 Lightning 3 Displayport Nightmare |
Pulling my hair out with this lol. I'm trying to avoid the whole adaptor/ multi-output/ v-sync/ tearing fiasco by going with this setup. My video card has 4dp outputs. My 3 monitors are identical and all have dp inputs. I'm using simple cables (mdp --> dp) for each. I cannot get all 3 displays to work at the same time on dp, no matter what. I have confirmed all monitor dp inputs work. All video card outputs work, and all the cables work. How? At one time or another, by swapping everything around, every monitor dp input and every video card output have worked, just not 3 at the same time, only 2 at any time. I have latest MB bios and 13.5 beta Catalyst video drivers (heard good things about and seem to work great). I tried swapping cards around, thinking there were bad outputs on video card, no dice, behaves exactly the same. I tried the bios switch on the cards, no dice. Could I really have 2 cards that are duds??? Highly doubtful. It seems hardware related. No matter what, when I try the 3dp route, 2 monitors always light up instantly upon early bootup,the 3rd never gets a signal (yes I make sure monitor input is set to dp) but yet Windows and CCC seem to recognize 3 monitors!?!? Everything is at stock speeds (at least until I get this figured out) except for the ram, I enabled XMP in bios. I just built this rig and all software installs are fresh. I did have different cards at one time though, but they were MSI 7970 NON-Lightning Boost Edition and had terrible overheating issues. They use the same drivers as the lightnings so I figured just swapping should be fine. Could it be as simple as re-installing drivers? Also seems doubtful, especially when it seems to happen at bootup? Now, if I use 1 dvi/hdmi output with 2dp outputs it works great. Only problem? TEARING! Which is exactly what I was trying to avoid! Everything really does work well besides that, no glitching, freezing, crashing, games run awesome. But I paid extra to NOT have tearing and I know this should work. Just can't figure this out. Any help would be GREATLY appreciated. CPU Intel Core i7-3770K 3.5GHz Quad-Core CPU Cooler Corsair H60 54.0 CFM Liquid Motherboard Asus SABERTOOTH Z77 ATX LGA1155 Memory Corsair Vengeance 16GB (4 x 4GB) DDR3-1600 Storage Mushkin Chronos Deluxe 240GB 2.5" SSD Storage Western Digital Caviar Black 1TB 3.5" 7200RPM Video Card 2x MSI Radeon HD 7970 Lightning BE 3GB Case Corsair 400R ATX Mid Tower Power Supply SeaSonic 850W ATX12V / EPS12V Optical Drive Asus BW-12B1ST/BLK/G/AS Blu-Ray/DVD/CD Writer Monitor 3x Asus VE248Q 24.0" OS Windows 7 64 bit |
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| Author: | LuckyNoS7evin [ 09 Jun 2013, 19:04 ] |
| Post subject: | Re: 7970 Lightning 3 Displayport Nightmare |
According to this review http://www.hardocp.com/article/2012/03/20/msi_r7970_lightning_video_card_review it can support 6 screens.... Also confused about your comment on HDMI as according to the photos on this review it doesn't have HDMI. I'm surprised you can't get 3 working correctly if it supports 6! |
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| Author: | BHawthorne [ 09 Jun 2013, 19:19 ] |
| Post subject: | Re: 7970 Lightning 3 Displayport Nightmare |
Quick question, can you snap a photo of the cables you are using -- particularly a photo showing both port connector ends? Where did you source your cables from? What length are they? |
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| Author: | hishutzi [ 09 Jun 2013, 19:21 ] |
| Post subject: | Re: 7970 Lightning 3 Displayport Nightmare |
Sorry about the confusion. It's actually the dvi output with a dvi/hdmi adaptor. |
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| Author: | hishutzi [ 09 Jun 2013, 19:31 ] |
| Post subject: | Re: 7970 Lightning 3 Displayport Nightmare |
This is the exact one here. I'm using 3 of these. http://www.amazon.com/gp/product/B003TSTDHQ/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1 |
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| Author: | Mawrtin [ 09 Jun 2013, 22:03 ] |
| Post subject: | Re: 7970 Lightning 3 Displayport Nightmare |
Isn't this something about having to have something connected to one dvi? like a dvi dummy plug or attach some random monitor just to try it out |
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| Author: | BHawthorne [ 09 Jun 2013, 23:16 ] |
| Post subject: | Re: 7970 Lightning 3 Displayport Nightmare |
Mawrtin wrote: Isn't this something about having to have something connected to one dvi? like a dvi dummy plug or attach some random monitor just to try it out no |
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| Author: | BHawthorne [ 09 Jun 2013, 23:18 ] |
| Post subject: | Re: 7970 Lightning 3 Displayport Nightmare |
hishutzi wrote: This is the exact one here. I'm using 3 of these. http://www.amazon.com/gp/product/B003TSTDHQ/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1 Odd, the cable length and type looks just fine. |
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| Author: | Haldi [ 10 Jun 2013, 00:40 ] |
| Post subject: | Re: 7970 Lightning 3 Displayport Nightmare |
Strange.... did you contact MSI customer support and ask them ? |
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| Author: | hishutzi [ 10 Jun 2013, 01:19 ] |
| Post subject: | Re: 7970 Lightning 3 Displayport Nightmare |
Haldi wrote: Strange.... did you contact MSI customer support and ask them ? Yes. They were the ones who told me to update the MB bios which I did. I am calling them again tomorrow to let them know bios update did not help and see what they say. They did confirm that this setup should work, which I knew but it's nice to have confirmation. I'll keep you guys posted and thanks for the replies, VERY much appreciated  Keep'em coming 
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