2160p resolution lags

[Luzkan]

Hi!

I have trouble with playing a 2160p resolution. It's lagging on VLC and MPC-HC (with LAV).

At this moment the best I got is PotPlayer (64bit) with all default, .mkv video on SSD instead of HDD and LAV/MPC-HC uninstalled from PC.

What's intresting on PotPlayer it's almost playable besides the fact that from time to time (in like 10-15s) there will be small slow-motion and audio lag. Right after PotPlayer the built-in Windows10 player is trying to catchup with smth like 15fps show. VLC, 5kPlayer and MPC-HC was completly unplayable (black screen/freeze).

I have GTX770, i5-4690 @3.5Ghz, 8GB Ram, Lenovo L27q-10

@edit it's almost working with K-Lite + MPC-Hc + hardware decoder: dxva2 copyback in LAV, like 30s of smooth video and 3-7 of low fps slowmo. Uhhh.
@edit2 hardware decoder: nvidia cuvid works for like 1m and then 15s of cluttering video (low fps) while audio still smooth, but waits every 3-4s so lagging video can catch up :/

File Info:
HEVC 2160p UHD BluRay HDR DTSHD5.1-DDR.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 12.3 GiB
Duration : 58 min 15 s
Overall bit rate : 30.3 Mb/s
Encoded date : UTC 2017-04-09 02:09:51
Writing application : mkvmerge v10.0.0 ('To Drown In You') 64bit
Writing library : libebml v1.3.4 + libmatroska v1.4.5

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5@High
Codec ID : V_MPEGH/ISO/HEVC
Duration : 49 min 22 s
Bit rate : 24.3 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.117
Stream size : 8.39 GiB (68%)
Writing library : x265 2.3+23-97435a0870be:[Windows]

@@@edit: I think it's something with h265 because h264 is playing fine (in mp4 format).
Feeling helpless with this one. :/