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  1. Member
    Join Date
    Mar 2015
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    melb
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    I tried playing the sample of Elysium off 4K samples with MPC-BE & the video stutters & cpu usage is 99-100% according to task man.

    My cpu is an older i7 870 stock at 2.9ghz. I tried this vid on another semi decent laptop & the stuttering & usage is crazy high to.

    Why is the usage so high? Other 4K videos barley use 25%.
    If this is so high, How would modern quad cores perform? Would they generate alot of heat?
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  2. Member
    Join Date
    Mar 2008
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    Netherlands
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    To playback HEVC you need a top notch CPU, That is if you software decode. A high end i7 might not even be enough..
    If you have a graphics card that can hardware decode HEVC you need al lot less cpu like i5 or even a high end i3 will do.
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  3. Member
    Join Date
    Aug 2006
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    United States
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    A NVIDIA GT 1030 (2GB VRAM) could provide 10-bit HEVC hardware acceleration for playing video files at a reasonable price. However, you would need a NVIDIA GTX 1050 Ti to meet the memory requirement (at least 3GB VRAM) if you want to subscribe to Netflix 4K.

    [Edit]The GPUs in Kaby Lake and upcoming Coffee Lake i3, i5, and i7 series CPUs can also provide 10-bit HEVC hardware acceleration. However not many motherboards provide HDMI 2.0 (required for HDR 10 + 2160p60fps) and HDCP 2.2 (required for commercial streaming services). The above NVIDIA GPUs also provide HDMI 2.0 and HDCP 2.2.

    UHD Blu-ray playback requires Kaby Lake or Coffee Lake i5 or i7 series CPUs plus a motherboard with HDMI 2.0 and HDCP 2.2 and SGX support. Graphics cards can't be used for UHD Blu-ray playback because of the requirement for SGX.
    Last edited by usually_quiet; 13th Sep 2017 at 12:56.
    Ignore list: hello_hello, tried
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  4. Member
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    Mar 2015
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    melb
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    Well I have to read up more when I get a chance, but it seems like the jump from h.264 to h.265 is only a small increase in PQ but 10X more demanding just so they can fit those 4K movies on a BD disc. And force old desktops to be completley upgraded.

    I watched two Elysium trailers in 4K, one was good old h.264 & ran perfect smooth & only looked a tad softer to my eyes image quality vs. the HEVC version.

    Also some 4K trailers online in H.264 like honey bees look absolutely amazing, so the codec looks to be only as good as the camera being used.


    Does anyone think if I overclock to around 4GHz with good cooler would play these HEVC 4K alright?
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  5. Member
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    Mar 2008
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    Netherlands
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    I don't think that overclocking would be of much help, but you could try.
    Though air cooling might not be enough so water cooling is almost a must.

    I would stick to H264 for now or buy one of the above suggested NVIDIA GPU'S

    Personally i think that the biggest advantage of H265 is for streaming services like Netflix, Slightly better picture quality but at roughly half the file size
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