I don't think all Haswell chips support 4k H.264. That's one downside of hardware decoders: they have limits on what they support. I suspect the decoder is actu

I don't think all Haswell chips support 4k H.264. That's one downside of hardware decoders: they have limits on what they support. I suspect the decoder is actually falling back to a software implementation to handle the bitstream since the hardware can't. For example: https://www.avsforum.com/threads/no-hardware-4k-h264-decode-on-pentium-g3258-with-hd-graphics.1936777/ https://www.avsforum.com/threads/no-hardware-4k-h264-decode-...