Digital playback vs NVIDIA SLI mode

[feniks]

Hello,

Just a question if anyone tried to playback Live TV (digital QAM) when running their systems in NVIDIA Display SLI mode (multi-GPU rendering) ?

It seems that serious lagging occurs on all QAM channels once NVIDIA SLI enabled, making them unwatchable. it affects only digital capture source and not the analog one.

If I run NVIDIA Display in non-SLI mode (primary GPU only rendering,s econd one idles) it's all OK.

I'm using same decoders for both sources (ffdshow video & audio). using Hauppauge HVR-1800 capture card (digital + analog feed).

[feniks]

does anyone know if there's a fix for playing digital channels in SLI mode?
thanks.

I've tried all video decoders (in NVIDIA Display SLI mode) I got on my system to following results:
a) Microsoft MPEG-2 Video Decoder: lagging on playing both analog and digital content
b) Intervideo non-CSS Video Decoder for Hauppauge: analog OK; lagging and showing trash on playing digital content
c) ffdshow Video decoder: analog content OK; digital content lagging
d) MPEG Video decoder: this one actually brings ffdshow Video to use just like ffdshow Video does

I think i'm going to try out Nvidia Purevideo to see if it can play digital qam channels in SLI mode with no lagging or trash on screen.

[feniks]

hah! i fixed it!

in deed i tried nvidia purevideo to same results. so i figured something is coming into way when playing digital content in SLI mode. guess what - it was FFDSHOW decoder (part of CCCP Community Codec Pack), after I uninstalled it, Purevideo shows normal (no lagging!) digital TV in fullscreen in SLI mode. woohoo! loving it