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7970 screen tearing in eyefinity - Advice?

post #1 of 6
Thread Starter 
I have been having screen tearing on my third monitor in gaming on my HDMI connected monitor. The two display port (DP) connected ones never tear with vsync, but the third odd connector always tears and it seems to be a issue with AMD cards when using multiple output types. I have tryed using 2x DP / DVI and 2xDP / HDMI and it doesnt fix it either way. Also, to confirm it is not an issue with the monitor itself.

From what I have gathered while looking arround on google, vsync only works on the connection type that is used on the main display which would be DP.

Would it be worth trying to return one of my reference 7970s to Newegg and buying a MSI 7970 PE that has 4 display ports? I already used the free Crysis 3 / Bioshock Inf. gift item which Newegg seems to raise a stink over when you return VGA items. They would likely try to deduct it from the refund which they seem to value at $170 for some reason.

Also, since the MSI card uses a different PCB, would that cause any crossfire issues with my reference card? I could only return one 7970 since I have had my first for over 6 months now.
Edited by Shaded War - 2/20/13 at 1:33am
post #2 of 6
Thread Starter 
I just found this which seems to confirm what I have issues with.

LINK
post #3 of 6
Thread Starter 
no ideas?
post #4 of 6
yeah, sorry but I don't think you can guarantee to solve it unless you have a card that has at least 3x display ports. Even cards with 3x or more DVI ports just use an internal display port to DVI adapter so the problem will still exist

I think its a bit hit or miss if you have problems though, I had an eyefinity setup with no issues using mixed outputs (DVI, HDMI and a display port to DVI adapter)

I was trying to help someone recently with the exact same issue (http://www.overclock.net/t/1358967/need-eyefinity-assistance-screen-problem#post_19268960) but some research quickly told me it was a common issue.
 
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post #5 of 6
Thread Starter 
The MSI 7970 PE has 4 mini DP connectors on it. You don't think using 3x DP on the card would solve the issue?
post #6 of 6
ahh, well you're in luck! to quote from that ATI webpage you linked:

"Screen tearing can be avoided by employing only DisplayPort connections in Eyefinity display groups."

Best solution would be if your monitors support display port.

I've used these with success, you need active adapters for eyefinity resolutions.... http://www.amazon.co.uk/dp/B004SUELLC/?tag=hydra0b-21&hvadid=9551160789&ref=asc_df_B004SUELLC but I don't know if the vsync issue would manifest itself going through the adapters... I've never done it so can't verify it first hand and not too sure of the exact cause of the problem so can't really infer if it will be an issue.

It's a shame they're quite expensive otherwise it would be worth a punt on them regardless but if you're going to have to buy 3 then I'd maybe try and contact the manufacturer or hope someone here has tried it
 
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