'Tiled' 4k monitors - Have the drivers improved things?

[VincentHanna]

When I say tiled, I mean those screens that achieve 4k using a DisplayPort MST driver hack to split the screen in to two images of 1920x2160.

I read things such this on Eurogamer

AMD has issues it needs to resolve - specifically, lack of sync between the two images when v-sync is disengaged, resulting in some ugly issues. A fix is promised, but for now

which is a bit worrying, but that was over 12 months ago.

Also this article about tiled 4k displays using a 295x2:

http://techreport.com/review/26279/amd-radeon-r9-295-x2-graphics-card-reviewed/3

The bigger issues have to do with the fact that today's best 4K displays, those that support 60Hz refresh rates, usually present themselves to the PC as two "tiles" or separate logical displays. They do so because, when they were built, there wasn't a display scaler ASIC capable of handling the full 4K resolution. The Asus PQ321Q can be connected via dual HDMI inputs or a single DisplayPort connector. In the case of DisplayPort, the monitor uses multi-stream transport mode to essentially act as two daisy-chained displays. You can imagine how this reality affects things like BIOS screens, utilities that run in pre-boot environments, and in-game menus the first time you run a game. Sometimes, everything is squished up on half of the display. Other times, the image is both squished and cloned on both halves. Occasionally, the display just goes black, and you're stuck holding down the power button in an attempt to start over.

So is it still as big a problem as it was back then, or have driver updates massively improved things.

 

[zYx]

I've been using my 4k dell for a while now and I can't complain, however it may be due to my powerful graphics card HD7990. I've been playing some games even on my three screens and I didn't see any scary anomalies.

Also I can't find any concrete info regarding those two hdmi connections in that ASUS monitor. How is it actually achieved? What graphics cards support it?

I eventually went for a dell. Cheaper, but I think better, because the power supply is internal (unlike ASUS) and dell has USB 3.0 hub with USB 3.0 SD card reader which ASUS doesn't have.

 

[dafadau]

I've got the 4k Dell too with SLI'd 780 Ti's; the driver issues have more or less gone away now. They occasionally resurface, but it's so much better than when I first got it and had to hard reset every time it went to sleep!