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R9 290 Crossfire with U2868PQU, No 60Hz at 4K

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  • Graphics
  • Crossfire
  • Monitors
Last response: in Graphics & Displays
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June 10, 2014 9:25:08 AM

Hi, it seems that my r9 290 will not work as diplay port 1.2 in 4k (60hz) even though it says it supports this feature. I have the catalyst 14.6 beta driver installed on windows 8.1 64 bit. Im using the new AOC U2868PQU monitor and have made sure that the monitor is in DP 1.2 mode. it works fine in 30Hz mode other than it being yahno, 30Hz.
Any help you can offer is greatly appreciated.

More about : 290 crossfire u2868pqu 60hz

a b C Monitor
June 10, 2014 9:33:30 AM

hmmm have you tried unistaling and reinstaling drivers? and have you tried switching to a none beta driver release
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a b C Monitor
June 10, 2014 9:35:06 AM

Make sure in windows you set it to 60Hz as well.
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Related resources
June 10, 2014 9:38:12 AM

I have tried both of these things, its actually better on the beta drivers, changing to 60Hz in windows causes screen flickering which is why im currently running at 30Hz
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a b C Monitor
June 10, 2014 9:40:52 AM

the screne flicker sounds like it might be a problem with the display itself have you tried runing with a single card in windows to se if you can do 60hz then?
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June 10, 2014 9:42:32 AM

i havent tried a single gpu yet, ill give that a go and report back
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a b C Monitor
June 10, 2014 9:45:44 AM

ok if its still buged can you see if it will work with the IGPU because if it still flickers after all of that it is likely a bad screen
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June 10, 2014 9:53:15 AM

yeah, no joy in single gpu either, although testing onboard gpu may be pointless as im not sure if z77 supports dp1.2 anyways

EDIT: just checked, HD 4000 is only DP 1.1, so no point in testing it

I also dont seem to be the only AMD user to experience this issue on the new 60Hz 4K monitors which leads me to believe its AMDs poor drivers or BIOS atm
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a b C Monitor
June 10, 2014 10:09:33 AM

so it is still flickering? try the other gpu and or beter yet try this display with another computer and what exactly do you mean by flickering? backlight flicker? or will the whole display flicker? and finaly have you tried using dual hdmi to se if that fixed it
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June 10, 2014 10:13:42 AM

its still flickering, and by flickering i mean everything on screen flickering, sadly i have no other computer to test it with, also this monitor doesnt support MST
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a b C Monitor
June 10, 2014 10:14:41 AM

well have you tried the other gpu? if its still bad im tempted to say its a bad montior but i dont know why it would only do it at 60hz, so when you instaled the beta drivers you COMPLETLY unistalled the old drivers beforehand
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June 10, 2014 10:24:57 AM

i have tried the other gpu, same story as the first, fine in 30Hz, says it supports it, change to 60Hz, massive flickering
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a b C Monitor
June 10, 2014 10:32:47 AM

Are you sure your displayport cable is 1.2 certified?
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June 10, 2014 10:35:24 AM

Its the one provided with the monitor, I'd like to believe its DP 1.2 certified
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June 10, 2014 10:42:47 AM

after searching the DP cables spec number into google (E164571-KS), although im not 100%, im pretty sure it isnt DP1.2 capable based on its rated speed, dick move AOC, dick move
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a b C Monitor
June 10, 2014 10:58:47 AM

no it should be i cannot imagen them doing somthing like that
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a b C Monitor
June 10, 2014 11:16:05 AM

I agree, i don't think you have a solution yet.
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a b C Monitor
June 10, 2014 11:40:31 AM

Bit of a long shot here but have you tried launching a game or watching youtube (flash!!) when at 60Hz? I noticed my old 5770 couldn't keep a stable image at 144Hz 1080p (flickering, blinking and tearing) when idling but did just fine as soon as the clocks went higher... 120Hz was fine even when idling.


edit is the monitor a single headed one? most 60Hz 4k monitors so far have been dual headed so they appear as 2 monitors in windows and use MST to hit that 60Hz...
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June 10, 2014 11:42:44 AM

I have tried that Kari, and im pretty sure my eyes started to liquidate in their sockets it was that flashy
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June 10, 2014 11:42:47 AM

ive ordered a DP 1.2 cable just in case (only cost me £10 so no biggie) we'll see when it arrives on thursday, until then im going to continue asking xfx support if they know of any issues with their dp1.2 compatability on their cards, as i havent seen any nvidia users or reviewers reporting this problem
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June 10, 2014 11:48:08 AM

it is a SST monitor and uses 1 cable, just like the new samsung and Asus models
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a b C Monitor
June 10, 2014 11:56:22 AM

All but a few 4k monitors run at 30 Hz effectively. It has something to do with the fact that they are actually two screens stitched together. Sorry for the crappy explanation, but you should Google it. That's likely your problem.
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June 10, 2014 11:59:50 AM

youre thinking of the older 4k monitors that rely on MST, thats not what this monitor is, its one of the new TN panelled monitors that supports 60hz SST
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a b C Monitor
June 10, 2014 12:14:23 PM

http://pcmonitors.info/aoc/aoc-u2868pqu-another-uhd-4k-...
Quote:
The monitor fully supports 60Hz (rather than being limited to 30Hz) at its native UHD resolution using DisplayPort. It will use SST (Single-Stream Transport) rather than MST (Multi-Stream Transport) to achieve this. In other words the operating system sees it as one monitor which is more straightforward in terms of applications displaying things properly.
....
An early June arrival is expected in the UK with the screen priced at around £500 including VAT.


ok, that's neat :D 

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a b C Monitor
June 10, 2014 12:24:21 PM

I'm glad you guys know what you're talking about. I did see a reference to displayport 1.2 vs 1.4 in my research. I assume you have that covered as well?
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June 10, 2014 12:37:38 PM

yes, im using display port because DP1.2 and hdmi 2.0 are all that support 4k 60Hz at the moment, and as hdmi 2.0 isnt a thing yet, im using DP1.2 :) 
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June 11, 2014 3:52:57 AM

I have exactly the same issue with a single R290X and the U2868PQU.
With my old GTX660, 60Hz works perfectly. I can only presume it's an AMD driver problem. After my first foray into AMD tech in a few years, I think I'll be swapping the R290X over to a GTX780.
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a c 141 C Monitor
June 11, 2014 3:57:45 AM

17seconds said:
All but a few 4k monitors run at 30 Hz effectively. It has something to do with the fact that they are actually two screens stitched together. Sorry for the crappy explanation, but you should Google it. That's likely your problem.


Yes, I have a Samsung 4k monitor as of a few days ago, this is the correct explanation. I cannot word it much better. very few actually do go to 60Hz, even though it may list it and may say it does in settings, it's really not.

I have this monitor (Samsung calls it RT panel but it is really a TN panel)
http://www.newegg.com/Product/Product.aspx?Item=9SIA2RY...
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June 11, 2014 4:56:46 AM

so are you running your samsung at 30hz or 60hz? because the likes of kitguru, hexus and linustechtips had no problem getting them to run at 60hz via DP1.2
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June 12, 2014 3:08:43 AM

new cable is here, still not working correctly so im getting shut of teh 290s, XFX support has told me that they have reported the issue to AMD so how long it takes to be resolved for AMD users is a good question, in the meantime im going back to nvidia
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a c 141 C Monitor
June 12, 2014 6:27:49 AM

tomsmithy666 said:
so are you running your samsung at 30hz or 60hz? because the likes of kitguru, hexus and linustechtips had no problem getting them to run at 60hz via DP1.2


Says 30Hz effective mode, 60Hz capable which can be reached, but they are actually 30Hz.

I have a R9 290X for reference as GPU.
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June 12, 2014 7:55:47 AM

well when my 780s arrive tomorrow, ill let you know if it really is an AMD issue, which im pretty sure it is, as the 780ti kitguru, linus and hexus tested it on reported full 60Hz capability
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June 12, 2014 12:11:11 PM

tomsmithy666 - I also have a 780 arriving tomorrow as a replacement for the R920x... but in the meantime, my old 660 GTX is running 60Hz perfectly on the same monitor. It obviously can't game at particularly useful refresh rates, but same system, same cable, same monitor, all running fine. It's definitely an AMD issue.
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June 12, 2014 1:10:05 PM

yeah, you being an actual person saying taht was all i needed to make me change to the 780 really, and thankfully overclockers had the 780 acx on offer today which was much appreciated
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June 13, 2014 2:56:48 AM

yep, 780s are in, 60Hz right away, definitely a screw up on AMDs part, no question.
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a c 141 C Monitor
June 13, 2014 3:26:02 AM

glad to know it is 60Hz for you, the next driver by AMD is projected to fix this issue.
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a b C Monitor
June 13, 2014 6:47:11 AM

yeh 4k suport in general is wonky as f$#&
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a b C Monitor
June 13, 2014 7:09:13 AM

unknownofprob said:
glad to know it is 60Hz for you, the next driver by AMD is projected to fix this issue.

For AMD fans, that's called doing the "AMD Shuffle". Its a dance they do with their drivers.... a fix is always right around the corner.
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a b C Monitor
June 13, 2014 7:21:00 AM

well to be fair nvidia had huge issues with the tilied displayed since they intialy did not suport 2 monitor suround
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June 13, 2014 9:51:01 AM

there is an issue with the R9 290, loads of videos of flickering or black screen on You Tube at 4K 60Hz with different monitors, Samsung included, definitely an AMD driver issue. Other thing from AOC, there is a DP capability setting in the menu OSD setup on page 27 of the manual, not sure if that makes any difference. The AOC cable is DP1.2 or the NVidia card wont work. I'm working with a Titan Black, works perfectly at 60hz.
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June 13, 2014 5:47:21 PM

it was an amd issue of some kind, i tried changing cables, did all of the OSD menu stuff which was what i actually checked when i installed the thing. was just really bizarre that the amd wouldnt work right, but im happy now as my GTX780s are actually a good bit faster than the 290s.
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June 14, 2014 2:26:59 AM

Hi,
I have explicitly checked DP 1.2 option at OSD menu, still flickering in 2D mode in W7. AC Black Flag however runs 60Hz no problem !!
3D Mark on the contrary flickers like crazy. Guys with Nvidia do not report this problem, so it is /sadly / an AMD issue.

I got here one 780Ti , but , honestly, AMD is the way to go ATM, as 3Gb are really not enough at 4K / see the reviews of Watch Dogs etc / Titan Black SLi would be ideal, but ..2x290 600€ 2x Titan Black sums up at 1800+€ ....
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June 14, 2014 5:29:34 AM

well i can always step up to the 6gb 780s if i need to, because EVGA are good like that. Your issue may be that youre on Win 7 as it doesnt support 4K, you really need to be on Win 8.1 for proper 4K support
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June 14, 2014 6:53:12 AM

Ok , that could be a culprit as well , I ll give it a try --
Will report back
Edit : in W8 the flickering @60Hz is the same -)) must be definitely a driver issue - Mr Google shows that a lot of people has been experiencing the same .

Shame on AMD

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June 15, 2014 12:27:52 AM

I am getting the same with the AOC monitor. 60hz on the 290X on any driver results in severe flickering over DP1.2. It has to be a driver issue. I have tweeted AMD and Thracks (Robert Hallock) about this issue and they're looking into it.

I used the panel without issues on my 780tis. Although as you've stated above, the cravat is that 3Gb is certainly not enough for 4K.
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June 15, 2014 2:47:07 AM

Silent_Scone said:
I am getting the same with the AOC monitor. 60hz on the 290X on any driver results in severe flickering over DP1.2. It has to be a driver issue. I have tweeted AMD and Thracks (Robert Hallock) about this issue and they're looking into it.

I used the panel without issues on my 780tis. Although as you've stated above, the cravat is that 3Gb is certainly not enough for 4K.


Thank you very much for your reply as it confirms pretty much what other guys here and elsewhere reported .. I got the same dilemma here : one TI here, but only 3Gb and Titan Black is 950 € .

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a c 141 C Monitor
June 15, 2014 2:50:08 AM

17seconds said:
unknownofprob said:
glad to know it is 60Hz for you, the next driver by AMD is projected to fix this issue.

For AMD fans, that's called doing the "AMD Shuffle". Its a dance they do with their drivers.... a fix is always right around the corner.


Somewhat True, according to their 14.7 Beta I read, I saw the heading 4k issues. Not much more then that, but that could mean a true 60Hz.
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June 15, 2014 8:09:05 AM

14.7 beta : did not find them anywhere - work in progress?
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June 15, 2014 3:43:06 PM

you see, although you guys say 3GB isnt enough for 4K, but im having no dramas in any game with these 780s, no dropping and chopping frames, smooth 60fps, no tearing, its brilliant. besides, us $K users are pretty much going to need to upgarde next generation as we will need to the core power for 2015s titles, in 4K i think we you should be more worried about horsepower as opposed to VRAM, as the 4K tests on the 780 6GB seriously didnt yield a reasonable performance boost over the 3GB, infact it was nigh on negligable.
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June 15, 2014 10:54:08 PM

I have read that Watch Dogs and Crysis on high settings filled the 3 Gb memory buffer... but, we shall see.
Titans are out of my reach, so, I might go back to Nvidia as well..
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