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djxcrx88
Participating Frequently
November 29, 2016
Question

GPU Load Drops to 0-1% when playing back 4k Project in PP CC 2017

  • November 29, 2016
  • 3 replies
  • 3265 views

Hey everyone,

If anyone could help me with this issue would be great!

Here are my SPECS:

- i7 3770k

- 256gb SSDs in raid 0

- 16gb ram

- GTX 1060 6gb (upgraded from a GTX 660Ti recently)

Here's the PROBLEM:

- Playback 4k sequence

- Starts off smooth

- While monitoring CPU/GPU load i get between 50-85% CPU & 20-30% GPU

- All of a sudden GPU drops to 0-1% and CPU usage is more or less the same but sometimes climbs to 95%

I have the latest Nvidia drivers...

I've tried creating a new project and just importing 2-3 4k video files and trying to play it back still get similar results...

I cant seem to playback 4k video without the gpu dropping suddenly at random point and starts lagging up a storm!

Any help is appreciated because I'm really going to give up on my rig.

I never had any issued like this before.

really considering switching to mac because i ran the same video files on Final Cut Pro... works flawlessly on a weaker i5 Macbook with an intel HD 5000.

I dont understand why.

    This topic has been closed for replies.

    3 replies

    mitchh60419785
    mitchh60419785
    Participating Frequently
    December 16, 2016

    @BillGehrke Yes I onlyl have one SSD... do I need more than one? When it comes to computer setups and systems I really don't know much about what is required for video editing so I need all the help that I can get.

    R
    RjL190365
    Legend
    December 16, 2016

    It sounds like that single SSD is trying to perform far too many tasks at the same time, especially on a SATA connection that cannot handle reads and writes simultaneously. With all the housekeeping and system tasks going on, the disk I/O performance on that truly single disk that's used for absolutely everything including the boot OS will effectively be five to six times slower than what it's capable of.

    In other words, your system's disk I/O performance is strangled by the use of a truly single disk.

    mitchh60419785
    mitchh60419785
    Participating Frequently
    December 16, 2016

    Well I have another hard drive that is 1TB which is what my Premiere Program is running on, don't know if that makes any difference.

    R
    RjL190365
    Legend
    December 16, 2016

    To those who are having problems:

    It's the CPU (or more specifically, a big imbalance between the CPU and the GPU). That GTX 1060 on most mainstream CPU platforms is spending most of its time waiting for the CPU to catch up. Unfortunately, there is currently no good choice as to which currently available Nvidia GPU that I would recommend for such a mainstream system build: The ones that are currently available are either overkill for the CPU or slower than the CPU's integrated graphics processor (IGP) or deliver too little of a performance increase over an IGP to justify its cost.

    R
    RjL190365
    Legend
    December 21, 2016

    Update on my previous post about the CPU/GPU imbalance:

    I did a real-world test of scaling down 1080i high-bitrate (100 Mbps CBR) MPEG-2 to 480i MPEG-2 DVD (5.0 Mbps VBR) on my two desktop PCs. On that test, if either the average CPU load or the average GPU load falls significantly below 100%, that configuration is likely to be imbalanced (performance-wise). The result is that an older GTX 970 (yes, it started working again) was fairly well balanced with a non-overclocked Haswell Refresh i7-4790K CPU (but would be quite overkill for an i5-6500), while the GTX 960 was clearly underpowered on the i7-4790K (note the GPU load of 100% while the CPU load barely averaged 50% and occasionally fell much lower) and a tad weak even on the i5-6500 (GPU load remained 100% but the CPU load hovered around the 60% to 70% mark).

    This test is unscientific, but should relate to the 4K playback issues fairly well.

    And since the GTX 1060 is more powerful in performance relative to the GTX 970, it's no surprise that both the Ivy Bridge i7-3770K (with little to no overclocking) and the Skylake i5-6600 CPUs are just not powerful enough to fully utilize the GTX 1060 as far as CUDA applications are concerned. Perhaps a GTX 1050 Ti would be a better match for either of those two CPUs?

    Matt Chandronait11713623
    Matt Chandronait11713623
    Participating Frequently
    November 30, 2016

    This sounds like your GPU is running out of memory. When that happens, Premiere switches to GPU-accelerated to CPU-only (Software Only) mode. 6GB should be more than enough, but even that can be inadequate if you have, say, some really hi-resolution still images on your timeline. It seems counterintuitive, but high-resolution still images can eat up all of your memory and if your GPU runs out of memory during a timeline preview or final output render Premiere will make that switch and then it doesn't switch back for the rest of the render. Dunno if that helps you, but that's a possibility to consider.

    D
    djxcrx88Author
    Participating Frequently
    November 30, 2016

    Hmm thats really interesting...

    Not sure how to address it though.

    I just dropped a few hundred $$$ on this card thinking it was gonna be good enough.

    My project has all 4K video, some overlapping, very little effects. little to no transitions.

    its literally a rough cut of the videos, put together.

    This issue also happened when I just did a test with 2 4K videos just imported them into the timeline and overlapped them.

    during playback same thing happens.

    - 50mbps video from an GH4 camera.

    - 30Mbps video from a DJI drone.

    i dont think its that bad is it?

    Bill Gehrke
    Bill Gehrke
    Inspiring
    December 2, 2016

    Thanks for all the help guys!

    Yeah it has nothing to do with a specific spot in the video,

    like i mentioned before i did a test with a new project and only added 2 videos to the timeline,

    and it still did the same thing during playback at random spots.

    I also noticed,

    after the lag occurs, I would pause the video, bring it back a bit,

    and play it back, it would play it back smoothly the second time.


    djxcrx88 wrote:

    I also noticed,

    after the lag occurs, I would pause the video, bring it back a bit,

    and play it back, it would play it back smoothly the second time.

    It is possible it is "learning" I have seen this many times myself.  But I cannot find any data being written.  I just played my seven layer highly complex h.264 PPBM timeline and the first time after starting the computer, clearing the Media Cache Folder and the Media Cache Files folder it immediately rewrites the 9 and 14 files.  First time I then play the timeline it misses two frames and the second time it misses no frames.  It adds no new files nor updates any one file.  Incidentally, the Media Cache Files I believe are the icons that you see at the start of a clip

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