Displayport issues with 980/970?

[gothuevos]

Just wanted to get some feedback from 980/970 owners who are using displayport, be it successful or not. There are more then a few threads on the geforce forums and elsewhere about people not being able to get displayport to work correctly on the 980/970 series. Most users seem to be using multi-display setups but it seems to be also affecting single display users as well (albeit maybe not as much?).

What are you guys' experiences, good or bad? Is this a very prevalent issue?

 

[OlyAR15]

I have one monitor hooked up via DP and another via DVI. The startup and BIOS only displays on the monitor with DVI. Other than that I've had no problems in Windows.

This is news to me. What are people complaining about?

 

[ShintaiDK]

I am using a EVGA 980 SC with displayport to a Dell 2713HM. Works fine.

The only issue is when I use 2 screens (U2407FPW) and its on DVI, the BIOS part will be on the DVI screen. However if I disconnect it, its all displayport.

 

[3DVagabond]

DP not working in dual monitor is before it goes into Windows, correct? If so, I'd hardly call that a problem or issue.

 

[Black Octagon]

Since individual card manufacturers can and do customise their output ports, it's probably helpful to discuss SPECIFIC brands and models of the 970/980-based cards

 

[Insert_Nickname]

Been running DisplayPort on my ASUS 970 for almost a month now, no issues.

Do be careful of cable quality, DisplayPort seems a lot more sensitive to it then f.x. HDMI/DVI. Especially at higher resolutions (>1080p).

 

[gothuevos]

Sorry, I should have been more specific. The issues relate basically to loss of signal to the monitor via DP - be it from startup or at random times. From the threads I've seen, it doesn't seem to be isolated to any one GPU or monitor manufacturer. Seems a bit more common with SLI or multi-monitor setups, but I'm not sure.

http://www.overclock.net/t/1515655/gtx-980-displayport-issue-anyone-else

https://forums.geforce.com/default/...44-16-and-11-on-displayport-with-gtx980-sc/6/

http://rog.asus.com/forum/showthread.php?52618-ROG-Swift-and-Nvidia-344-16-Displayport-issue

 

[aigomorla]

I have one monitor hooked up via DP and another via DVI. The startup and BIOS only displays on the monitor with DVI. Other than that I've had no problems in Windows.

This is news to me. What are people complaining about?

the issue your describing.

can not get bios or post to show up in DP.

NEED to use DVI, which means one monitor is always connected via DVI.


It would be nice if i could have bios display in DP plug.

I am on 980GTX SLI with 3 1440p monitors..
2 is connected to DP, while 1 is connected to DVI-D.
Again it would be nice if i could have all 3 connected to DP.

DP not working in dual monitor is before it goes into Windows, correct? If so, I'd hardly call that a problem or issue.

it is a problem if u need to view post / go into bios and ur on multi monitor.

lol..

 

[3DVagabond]

it is a problem if u need to view post / go into bios and ur on multi monitor.

lol..

Maybe I'm misunderstanding, but it appears on the DVI screen? Correct?

 

[alcoholbob]

Most DP problems with single displays are due to non-VESA compliant DP cables, often with a live 20 pin wire in the cable.

 

[gothuevos]

Was able to put my system together last night....Asus Strix 980 powering a ROG Swift pg278q....happy to report no issues with the displayport. Reading some of those threads though, makes me feel lucky.

 

[KaRLiToS]

http://www.overclock.net/t/1515655/gtx-980-displayport-issue-anyone-else/0_30

One month later, the OP who is a OCN moderator still has the issue.

http://www.overclock.net/t/1523126/yt-far-cry-4-featuring-nvidia-gameworks/0_30#post_23109166

I have a u28d590d. The same panel is used in others monitors such as the pb287q from Asus.

The 900 series is having issues with displayport connections on these 4K monitors going to sleep while windows is booting causing windows to not load. Nvidia doesn't currently seem to be very concerned.

Only bad part is there currently is no single gpu that can effectively run 4K on every single game.

Far Cry 3 looks very nice in 4K. I assume Far Cry 4 will too.

The issue is not only for this monitor (U28D590d) , I have seen many other users having the same issue but with different monitors such as Asus PB287Q 4K .

At this point, I think a firmware update should help.

 

[Insert_Nickname]

The issue is not only for this monitor (U28D590d) , I have seen many other users having the same issue but with different monitors such as Asus PB287Q 4K.

Having spent some time reading though those threads, it would seem to mostly affect 4K panels. Though a few people report issues on 1080p. Most, if not all, 1080p users use high refresh rate (120Hz-144Hz) panels. I wish some of them would report what exact type of cable they use (including length), because I have a sneaking suspicion the cables cannot handle the bandwidth required. For 4K we're talking 12.54Gbits/s (or potentially 14.26Gbits/s). That's actually more then 10Gbit Ethernet, and with the cable requirements for 10Gbit Ethernet in mind it could be an issue if they're using an el-cheapo cable that cannot handle those requirements.

I'm not saying the above is correct, if anyone can disprove it, we could at least narrow down the issue...

 

[aigomorla]

Maybe I'm misunderstanding, but it appears on the DVI screen? Correct?

yes however i would like to remove the dvi cable completely and use all DP ports.

thats the issue.

i am forced to use a DVI cable

 

[KaRLiToS]

Having spent some time reading though those threads, it would seem to mostly affect 4K panels. Though a few people report issues on 1080p. Most, if not all, 1080p users use high refresh rate (120Hz-144Hz) panels. I wish some of them would report what exact type of cable they use (including length), because I have a sneaking suspicion the cables cannot handle the bandwidth required. For 4K we're talking 12.54Gbits/s (or potentially 14.26Gbits/s). That's actually more then 10Gbit Ethernet, and with the cable requirements for 10Gbit Ethernet in mind it could be an issue if they're using an el-cheapo cable that cannot handle those requirements.

I'm not saying the above is correct, if anyone can disprove it, we could at least narrow down the issue...

Maybe, but I doubt there are only a couple of users using GTX 980 for 4k monitors.

Also, I have seen users with 1440p having the issue :

Having the same issue with my asus 980 and 3 dell u2713. I basically had to hook one monitor up using hdmi to get things to work properly. And then it still sometimes doesn't cooperate.

Those kind of issues suck because only few users experience and the companies tend to focus on more common issues that more people experience.

 

[3DVagabond]

yes however i would like to remove the dvi cable completely and use all DP ports.

thats the issue.

i am forced to use a DVI cable

Sorry, I misunderstood. I thought it was only when multi monitor was used with one being DVI the boot cycle would default to the DVI out.

 

[Insert_Nickname]

Maybe, but I doubt there are only a couple of users using GTX 980 for 4k monitors.

Sorry for not getting back at this sooner. I've been thinking this might be an issue relating to some combinations of (V)BIOS/(V)UEFI. Some newer cards, particularly EVGA and MSI feature UEFI VBIOSs, which have known incompatibilities with certain (mostly older) mainboards.

 

[JeffMD]

Sorry, I misunderstood. I thought it was only when multi monitor was used with one being DVI the boot cycle would default to the DVI out.

That was my understanding too. It seems like on all cards, DP and HDMI are considered secondary for bios, and will only show bios if there is no dvi monitor attached. I've been using hdmi out for years and this is how its worked.