HDMI output slows down & accelerates

Since I got a FullHD TV, I've been having problems with HDMI in my P7811. I use only one display at a time, laptop or TV. Video on laptop is great, no problems with rate, problems start when I connect my laptop to the TV with 1.8m HDMI cable. Desktop is ok (I use Win7 Pro), real problems start, when I play movies. Player used doesn't make a difference, I tried VLC, MPC, 32 and 64-bit versions, different codec packs, I turned off Powermizer, set the RMClock for the Maximal performance or turned it off completely, changed graphic drivers, nothing helps. Movies sometimes slow down or accelerate, for a very short time once every few minutes and it's very annoying. Movie quality is insignificant, regular 700MB DVDRips, 720p, 1080p, all of them. I read some topics, most of them ended in trying turning off Powermizer, which didn't help, just raised the GPU temp. I'd really appreciate any suggestions.

If it matters, I use 2 Seagate HDDs, 320GB, 7200 RPM, not yet RAIDed.

 

Try changing the HDMI drivers. Then make sure that your cord works somewhere else. If it does then use VGA plus an audio cord.

 

AFAIK HDMI drivers are a part of NVIDIA graphic drivers. I tried Dox's and regular, downloaded from laptopvideo2go.com. I'd rather stick to HDMI, because it's easier and it's digital, while VGA is analog and requires, as You mentioned, additional audio cord. Unfortunately, I don't have any other source of HDMI output, but I'll try another cord.

 

Are you using a clone output or switching completely to the television as a monitor. I find when using HDMI on my HDTV it helps to use the television as the single display. Also there's a setting in the nVidia control panel for "Single-Display Performance" and "Multiple Display Performance" under 3D settings, not sure if that will make a difference.

 

All the previous times I used single TV display, clone output was a waste of time, just as single TV display. Today, after my VGA cable didn't work with my laptop and TV (which is very weird, but never mind), I tried using extended display and TADA! Movie was displayed almost smoothly, some glitches and stuttering were present, but I was able to watch and enjoy it. Seems a little weird... Wonder, why does it happen like this? Two displays, even in extended output, seem to squeeze more juice from GPU, than single TV, doesn't make sense.