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MP 5,1 (mid2010) unable to play 4k 60fps

R

raist8

macrumors newbie
Original poster
Feb 24, 2019
16
1
Hello,

I recently upgrade a MP 5,1 (mid 2010) with this specs:

0. 3,46 6 core Intel Xeon
1. 32 GB RAM
2. Pcie CARD with 2 SSD (on for system)
3. Radeon RX580 Shappire Nitro+ 8GB
4. AOC 4K monitor U3277WB (connected by DP 1.2 cable)


All is working fine except playing 4k 60fps. In youtube I have "loading pauses" every 5 seconds (like it was rebuffering). It's not a bandwidth problem (600Gb U/D). With a local file (playing with VLC or mpv) I have the same: very laggy video (jump video, lose frames)

Anyone else with a similar configuration have problems with 4k60fps? I have to say that with, for example, 4k30fps it's all OK.

Thank you in advance for your help!

EDIT: I'm using Mojave 10.14.3
 
It's most likely less about hardware strength, and more about whether all the dots are joined so that hardware video decoding is active for the video format in a given situation
 
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Thank you so much for your reply. I also think that is not about hardware strength, but with the simple scenario of playing this on youtube:
(4k60fps) with several browsers, including Chrome with hardware video aceleration I'm obtaining bad results on 4k60fps.

I don't know how else try.. I'm finaly thinking that's a Mojave problem...
 
What hw config do you have? Are u using Mojave?

EDIT: Sorry, I didn't see your signature
 
Last edited:
raist8 said:
What hw config do you have? Are u using Mojave?

EDIT: Sorry, I didn't see your signature
Click to expand...

Yeah, the HW as per sig, and regarding Mac OS I generally update as they roll out. I typically don't do betas on my workstation, unless there is a huge new feature like a certain driver for GFX or whatever. I'm on 10.14.3 now.
 
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I don't have drivers for my RX580, it's all on Mojave support. I don't know what the problem is.. I can play smoothly to 4k 30fps, from there to up, nothing..
 
Very similar spec as yours. And just tried that youtube link. I can also play it smoothly without any frame drop.
Screenshot 2019-02-24 at 10.14.56 PM.png


If you have spare SSD laying around. May be try a clean installation is faster than diagnosis.
 
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I don't know what's going on.. With a clean install of High Sierra same issue.. I have no explanation for this.. I don't know where is the bottle neck..
 
Here are my screens (lot of droped frames):

Captura de pantalla 2019-02-24 a las 22.45.38.png

My system:

Captura de pantalla 2019-02-24 a las 22.48.12.png

The only thing I saw different is your view port (1920x1080 and mine is 1920x720) ..

EDIT: Do you have any kind of codec or similar installed on your Mojave installation?
 
Last edited:
raist8 said:
Here are my screens (lot of droped frames):

View attachment 823401

My system:

View attachment 823403

The only thing I saw different is your view port (1920x1080 and mine is 1920x720) ..

EDIT: Do you have any kind of codec or similar installed on your Mojave installation?
Click to expand...

720p view point shouldn't make any difference. (p.s. I believe that *2 is because I am running HiDPI, which should be more demanding than non-HiDPI)
Screenshot 2019-02-25 at 5.59.22 AM.png


No extra codec installed. Just native Mojave and Chrome.

Some extra info. When I playing that YouTube video, the GPU utilisation rate is 100%.
Screenshot 2019-02-25 at 6.04.31 AM.png


CPU utilisation rate is about 50%
Screenshot 2019-02-25 at 6.05.38 AM.png
 
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Thank you! How can I see those stats? There are from any application on osx or 3rd party? Again, thank you for your help.
 
Just chiming to say that, with a very similar set up (W3690, RX580, 4k monitor, 10.14.1), I don't have the delays that resemble loading pauses, but I do have a healthy number of dropped frames—even with 20s in the buffer. It's watchable, but you can notice the dropped frames, especially on pans.
 
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raist8 said:
Thank you! How can I see those stats? There are from any application on osx or 3rd party? Again, thank you for your help.
Click to expand...

That's from a 3rd party software called "iStat".

But you can get the same thing via the macOS build-in activity monitor (GPU History and CPU Usage / History).
Screenshot 2019-02-25 at 7.05.59 AM.png


When I try to make this screen capture. I tends to believe the issue is due to CPU limiting.

As per my last post, the total CPU usage is about 50%. However, for W3690, only the first 50% are true physical cores. The 2nd 50% are the virtual cores, which means, performance not guarantee.

I suspect when you playing this video, due to some background activities used up some CPU resources, your CPU hit its limitation, and cause the shuttering / drop frames.

In fact, from this new screen capture. We can see that each physical / virtual cores pair are running almost right at 100% (assume each pair has 200% capacity). Which means, all physical cores may be already saturated.
 
Last edited:
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I think It cloud be a CPU limitation. The strange thing is that some users with same CPU specs, don't hace this problem..

a.png
 
This capture is from a local video file in 4k 60fps (reading from SSD) and played with mpv . It seems that in local, the GPU is not at 100% during the execution, but CPU is near 100% all the time ..

Here I have another from Chrome Youtube 4k60fps video. 100% on GPU and almost on CPU:

b.png
 
raist8 said:
This capture is from a local video file in 4k 60fps (reading from SSD) and played with mpv . It seems that in local, the GPU is not at 100% during the execution, but CPU is near 100% all the time ..

Here I have another from Chrome Youtube 4k60fps video. 100% on GPU and almost on CPU:

View attachment 823631
Click to expand...

So, you mean even on a clean install Mojave, with the latest clean Chrome, with good internet connection, that 4k 60FPS YouTube video still very choppy (with that CPU / GPU usage capture)?
 
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