I already wrote the same post into the displayfusion steam section, nevertheless maybe will someone with an idea read it here.

I got the following Problem:

When DisplayFusion is running and i have a twitch stream (or other flash based application, e.g.: youtube video) running on my 2nd monitor i'm getting heavy stutters ingame. If i close DF the problem disappears and if i close youtube, twitch stream (or something similar) on my 2nd monitor and keep DF working, everything works fine as well.

I have tested, nearly all beta and release version. The Problem appeared the first time after an upgrade from 4.x to 5.x.

For some further understanding i'm using the following setup:

DisplayFusion Pro (tested al lot of different Versions)
Google Chrome (main browser -> issue occurs with other browsers as well)

Intel Core i7 2600k
16GB DDR3 Ram
Asus Geforce GTX Titan
Asus P8Z68 Deluxe
120GB SSD
Asus Xonar D2X
2 TB Seagate HDD
BeQuit 850W - Dark Power Pro

1st - 24" Asus VG248QE (1920x1080 - 144Hz)
2nd - 24" SyncMaster 2443BW (1920x1200 - 60Hz)

Stutters were seen, as explained above, in all tested games (for example: Starcraft 2, Dota 2, Gw2, Diablo 3, Skyrim, BF3 ...)

I can't figure out any solution from my side and i'm a bit frustrated, because i like DisplayFusion a lot and enjoy using it.
If there are any questions, just let me now it and i'll provide you with further information.

Thanks for help!

respectfully

Daniel

I'm already using it, without any effect/change on my problem!

I wonder if this is similar to or related to something I am also seeing on the current DF betas:

Any browser-based video playback (YouTube, Vimeo, FunnyOrDie, ComedyCentral (Daily Show/Colbert Report),etc) will play for a bit and then the video playback will freeze for a few seconds (audio is still playing correctly). If I exit out of DF the issue goes away *usually*. Sometimes I have to re-start the browser itself.

I haven't seen this in dedicated/stand-alone video playback programs (VLC, MPC-HC, DVDFab Media Player), nor have I had any issues with any games in this respect.

This has only been in the current stretch of betas. I'm not certain which one it started in, but I suppose I could go back through them and check it one-by-one until I find it again. Any ideas?

Some Updates:

We couldn't isolate where the problem is caused exactly, nevertheless beta 14 and higher of the current DF-Version removed the problem for me completely!