Just upgraded to rx 470 youtube videos in 4k still stutter?

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Midnightowl626

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Nov 28, 2016
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Just upgraded the first part for the first time in a pre built pc i bought a while back, i bought this Xfx RX 470 for gaming and to watch youtube videos in 4k and netflix. thing is when i watch a youtube video the 4k video stutters and it is not because it is buffering i have a 70 mbps connection :/ maybe i need to upgrade something eles in my pc? maybe my cpu? please help im help to upgrading a pc. im looking to buying a new PSU first but i want to know what might be causing the 4k youtube videos to stutter this is my setup https://pcpartpicker.com/list/FK4M4C
 
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Midnightowl626

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AMD FX-4130 3.8GHz Quad-Core Processor
Gigabyte GA-78LMT-USB3 Micro ATX AM3+ Motherboard
Team Vulcan 8GB (2 x 4GB) DDR3-2133 Memory
XFX Radeon RX 470 4GB HS Triple X Video Card
Rosewill Stallion 450W ATX Power Supply
Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
 
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Chugalug_

Chugalug_

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Jan 28, 2016
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There's the problem. :p
The CPU is in need of an upgrade for sure.
Later down the line, what would be your budget for an upgrade?
I suggest waiting for the boxing day sales to kick in and grabbing an i5 6500 and a cheap mobo with a kit of DDR4, that should set you up nicely. Upgrading our PSU during that time is also a plan since you should be able to find a quality one for about $30 give or take on sale.
 
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Midnightowl626

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thanks bro :) i had a feeling it was the cpu. my budget later on should maybe be $250-$400 depending on how work goes. what kind of PSU would you suggest for all this?
 
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tsnor

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Nov 20, 2008
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Ummm. Youtube video stutters.

DOWNLOAD the video and play it back from your local drive. If no stutter then your INTERNET connection is the problem. (I did read your post, and know you said "thing is when i watch a youtube video the 4k video stutters and it is not because it is buffering i have a 70 mbps connection :/ ").

It is very unlikely that your CPU (AMD FX-4130 3.8GHz ) is too slow to playback the video, and your rx 470 has vp9 acceleration for youtube 4K content.

Before re-configuring my home wireless infrastructure I could get stutter on my 216 Mb/sec connect speed wireless LAN coming from one server and playing on another. I used inSSIDer (free download) to switch channels to something with less interference.

How do you get from your 70 mb/sec connection to your PC ? If wireless, suggest you run a test using an ethernet cable.

Update: Simpler crosscheck for CPU being the source of stutter. Launch Windows Resource Monitor (type "perfmon /res" in the search window without the quotes). Run the video. Look at the graphs of the CPU utilization ? Do they spike to 100% when you hit stutter? Now look at the graphs of Network activity, do they spike down at the time of the stutter ?
 
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Midnightowl626

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Hi i did that and it goes up to 98% then the stutter happens and then when it goes down to like 93% the video plays again but then stutters soon after when it goes back up to 97 or 98%. When im not playing the video it stays at 3-10% cpu usage.
 
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tsnor

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Wow. I take it back. It's CPU.

Can you verify that your browser is enabled to use your video card for playback decoding ?

For example, in chrome, open a new tab, type: "chrome://gpu" (without the quotes) and look under "Graphics Feature status" - all (or at least most of) the features should say "hardware accelerated".

Maybe try a few different browsers and see if only one stutters....


 
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Midnightowl626

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two seem to be disabled? this is what it says
Graphics Feature Status
Canvas: Hardware accelerated
Flash: Hardware accelerated
Flash Stage3D: Hardware accelerated
Flash Stage3D Baseline profile: Hardware accelerated
Compositing: Hardware accelerated
Multiple Raster Threads: Enabled
Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
Rasterization: Software only. Hardware acceleration disabled
Video Decode: Hardware accelerated
Video Encode: Hardware accelerated
VPx Video Decode: Hardware accelerated
WebGL: Hardware accelerated
 
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tsnor

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Sure looks like you are using hardware acceleration.

Given you are out of CPU, even with hardware acceleration, could you flip to the 'about chrome' in help and see if you are running the 64 bit version. You will see “(64-bit)” at the right side of the version number, you’re using a 64-bit version of Chrome.

Some sources claim another 10-25% CPU performance with the 64-bit chrome version over the default 32-bit. To move from 32 to 64 bit just download the 64 bit version and install it. All of your setting, history, bookmarks, etc get carried forward.

Here is an older performance ref: "..In graphics and multimedia content, the 64-bit version of Chrome is averaging a 25 percent improvement in performance. .." http://arstechnica.com/information-technology/2014/06/64-bit-chrome-is-faster-more-stable-and-more-secure/

update: fyi It's the " VPx Video Decode: Hardware accelerated" says you are using your GPU to run youtube 4K vp9 encoded videos.
 
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Midnightowl626

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yup Version 55.0.2883.75 m (64-bit) is what i have :/ what sucks is that im broke right now and cant upgrade my cpu right awayXD wish i could lol. thanks so much for all the info and help bro! i learned alot
 
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tsnor

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Nov 20, 2008
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FWIW: I downloaded this 4K webm file. : https://commons.wikimedia.org/wiki/File:2160p_Demo_-_3840x2160_pixel_4k_Video_-_a_timelapse_project_by_Florian_Friedrich.webm 111 MB.

Ctl-O in chrome lets you play a file.

Played it on my i5-4690K stock clock w/ hd7850. No problem playing in chrome 64 bit at 30% cpu utilization. GPU clocks went from idle to full, with 30% gpu util.

Played it on my old i7-920 stock 2.6 clock w/ gtx 960. No problem playing in chrome 32 bit at 20% cpu utilization. GPU load never got high enough to turn on the gpu fan, but playback time is short.

Played it on my very CPU challenged AMD e450 laptop. That's a really early APU at 1.6 ghz. Stutter/freeze unwatchable. CPU limited.

Went back to i5 and played the file using VLC. No stutter, no problem, 20% cpu.

update: (to be clear, none of those PCs have 4K monitors. I've read that the file is decoded at the encoding resolution, then scaled so that the smaller output monitor would not change the decode CPU cost... the i5 and 920 are using 1920 x 1200 screens , the e450 has a 1366 x 768 )
 
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tsnor

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Nov 20, 2008
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But FX 4350 is not weaker than an i7-920 at stock clock, it has faster single thread and slightly lower multi-thread performance. http://cpuboss.com/cpus/Intel-Core-i7-920-vs-AMD-FX-4350 The i7-920 seems to have no trouble with playback.

I suspect that the benchmark I ran is not comparable to the netflix workloads, or that there are scaling shortcuts possible singe the monitor is not 4K.


 
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Cubsfan15

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Boxing day sales? ive been waiting to finally buy the parts to a computer for a while, but the prices have gone up a lot more than I'd like since around Black friday, even though there weren't great deals... I want to build around xmas. Do you think I should hold out another week after xmas to order and save $?
 
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