[mythtv-users] PCI-E x16 2.0 slots running at x4

[Tom Bongiorno]

On Wed, Dec 23, 2015 at 1:53 PM, HP-mini <blm-ubunet at slingshot.co.nz> wrote:

> On Wed, 2015-12-23 at 12:47 -0500, Tom Bongiorno wrote:
> > Hello All,
> >
> >
> > While shopping for a new low power SFF backend/frontend appliance
> > configuration, I came across some motherboards that have a PCI-E x16
> > 2.0 slot running at x4. I need a x1 slot for my Ceton and a x16 slot
> > for a Nvidia GT610. The GPU is part of the purchase, and can be
> > changed.
> >
> >
> > I think that the GT610 should be able to do 4k video. Will limiting it
> > to x4 cause bandwidth or decoding issues?
> >
> >
> > -Tom
> > _______________________________________________
>
> I doubt the PCI-e lane count/version will have much effect on decoding
> compressed video directly to screen buffer (VDPAU).
> More of a problem is the video card model & what you mean by 4K..
> IIRC
> GTX650 was the first to have 4K outputs & 4K H264 decode but are not
> HDMI2.0 & no HEVC decode.
> The GTX750 has partial h/w HEVC decode no HDMI2.0
> AFAIK only GTX950/960 have HEVC 4K decode & HDMI2.0 to output 4K60p4:4:4
> but these are bottom end gaming cards.
>
> So there is no suitable latest generation HTPC card (from nVidia) that
> could be fanless (or modified) or half height.
> Someone like Zotac could make a half height with a mobile 940M but that
> would not have HDMI2.0.
>
> Might be time to consider Intel, their CPUs are the best & the iGPU can
> be good enough but mythtv's VAAPI support does not have parity with
> VDPAU.
>
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Thanks for the info about the Nvidia card features. Based on what you said,
there may be no reason to update my GT210 at this time. I will wait until
there is plenty of 4k content to view, and then evaluate the options at
that point.
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