Choppy 4k video on 4k capable computer

[Gormandy]

Hi,
I built a custom desktop and bought a 4k monitor. My A10 processor's GPU was not capable of plays video in 4k and I was not surprised. I went and bought a R7 260X which claims to be capable of 4k gaming and 4k video, but I get very choppy playback on a youtube 4k video. I bought a second R7 260X and put them in Crossfire mode, and saw no performance boost. I learned that crossfire only has advantages in crossfire compatible games in full screen. No matter, the R7 260X should be capable of 4k video. Why am I unable to fix my choppy playback? I've tweaked around settings in CCC to no avail.

Here are my full system details:
AMD A10-7700K APU
2x XFX Radeon R7 260X 2GB graphics cards in crossfire
16GB Radeon Performance series 1866 Mhz RAM
GIGABYTE GA-F2A88X-UP4 Motherboard (http://www.newegg.com/Product/Product.aspx?Item=N82E16813128655)
SSD Hard drive.

I also have a 105 Mbps internet connection, plugged in directly. It's not that the video isn't loading fast enough because I can see the buffer being well ahead of where the current playback is.

Any help would be appreciated.

Thank you.

 

[IInuyasha74]

You have been miss lead a lot. First, you don't need a dedicated GPU.
http://www.techradar.com/us/news/computing-components/processors/amd-prices-kaveri-apu-paints-target-on-intel-s-haswell-1214816

Your APU's GPU supports 4k video playback.

You were right about the crossfire. Whoever said at first it would help miss lead you, but it is completely useless in most games and watching videos.

Chances are it is some software or internet based issue. Either the server is too busy to send you 4k video, or your interent speed isn't fast enough. 4k requires a massive 10.2Gbps connection to play at 30FPS through HDMI, so chances are even if you are seeing it is buffered they could be reducing the total number of FPS to make it require less bandwidth.

Could also be the video player in your browser attempting to play it is having problems and not able to keep up with it. You should try a 4k video on your hard drive as a test to see how well you do at just straight 4k video. There should be demo samples available.

 

[LostAlone]

My money is on your internet connection.

4k videos are HUGE files. Vast. Absolutely massive. There's plenty of times that streaming 1080p at 3mbps quality will stall out on a typical home connection. 4k video is at an absolute minimum four times the data size of 1080p (four times the pixels in a 4k frame) and if you want high quality it'll be much higher than that.

The world is not ready for 4k. Sorry, it's not.

 

[Gormandy]

One more thing to add is that I'm using the display port and am correctly display at 60 hz on the monitor.

Even if the video is fully buffered and I don't play it till it's fully buffered I get this issue.

That's a good idea, I'll try to play a video off my hard drive to see if the issue is my internet / browser

 

[Theopneusty]

Hi there,
I had a similar issue for maybe a couple months where video would slightly stutter/jerk in many different streaming web videos and high quality 4k video files from my SSD HDD.
I went into my bios for no apparent reason and realised my PCI express bus speed was set to 2x... So SLOW. I set it to auto and then it said 16x... I rebooted and it fixed the issue for me after months of trying different things even installing windows 10 preview hoping it would fix it. It was my own stupidity not having changed settings from defaults after I had flashed/updated my bios months back.
I really hope you had solved the issue by now but if you hadn't hope this helps.

 

[Gormandy]

Hi there,
I had a similar issue for maybe a couple months where video would slightly stutter/jerk in many different streaming web videos and high quality 4k video files from my SSD HDD.
I went into my bios for no apparent reason and realised my PCI express bus speed was set to 2x... So SLOW. I set it to auto and then it said 16x... I rebooted and it fixed the issue for me after months of trying different things even installing windows 10 preview hoping it would fix it. It was my own stupidity not having changed settings from defaults after I had flashed/updated my bios months back.
I really hope you had solved the issue by now but if you hadn't hope this helps.

Thanks for the response. I can't change pci bus speeds on my gigabyte motherboard unfortunately... it's not even am iron which seems kinda silly. Still having the same issue but I've given up at this point tool I get a newer desktop with a better motherboard.

Edit: also it's definitely not the Internet connection. I get this on local files too. At this point I've tried everything from different operating systems to different media players. The issue I believe is the PCI bus speed.

 

[maxalge]

Hi there,
I had a similar issue for maybe a couple months where video would slightly stutter/jerk in many different streaming web videos and high quality 4k video files from my SSD HDD.
I went into my bios for no apparent reason and realised my PCI express bus speed was set to 2x... So SLOW. I set it to auto and then it said 16x... I rebooted and it fixed the issue for me after months of trying different things even installing windows 10 preview hoping it would fix it. It was my own stupidity not having changed settings from defaults after I had flashed/updated my bios months back.
I really hope you had solved the issue by now but if you hadn't hope this helps.

Thanks for the response. I can't change pci bus speeds on my gigabyte motherboard unfortunately... it's not even am iron which seems kinda silly. Still having the same issue but I've given up at this point tool I get a newer desktop with a better motherboard.

Edit: also it's definitely not the Internet connection. I get this on local files too. At this point I've tried everything from different operating systems to different media players. The issue I believe is the PCI bus speed.

install hwmonitor and monitor temps. could be throttling. You may be asking too much of that poor cpu.

http://www.cpuid.com/softwares/hwmonitor.html

sell one 260x your apu cant even max out one, the other is wasted.

Also your power supply could be the issue, make and model?