HD4000 Slow/glitchy playback on Mavericks

[Singularity]

Hello,

I have a little problem using the HD4000 in the latest OS X.
Im using it on HDMI and set 1080p display in Multibeast. I tried 64 and 32MB ram in BIOS with the same results. Previously i got it working right with ML, what am I doing wrong? Should I need to edit something?

Tried Plex Media Server and it works perfectly with my LG TV, beautiful, smooth frames I get with that way.

 

[Singularity]

Looks like the glitch disappears when using ML 10.8.4 again. Even if its an install of a MBP HDD without any modifications. Any suggestions?

Also Cinebench (R11.5)score boosts by 6 fps (16-»22)

build is:
i3-3225
hd4000
asus p8z77-m pro
8gb 1866mhz ram
2tb wd20earx

 

[Singularity]

Most videos and tasks run smoothly without glitches but some like look this: https://www.dropbox.com/s/jgud5yclon77vkt/Screenshot 2013-10-28 00.58.31.png
Those movies that have no glitches still look worse than streaming it via Plex.

Tried all kinds of RAM settings in BIOS, nothing changed.