Chopping and poor working

[Iwanche]

I had these problems with playback each program in full screen, for example xbmc, a lot of chopping, a lot of poor working and can not play in HD nothing. I can not let full hd or 720p video in full screen, or anything when I want to work in full screen mode comes to shredding and breaking and lines appear and the image quivering. Is there any solution for this? And yes, don't work transparency.

My specs:

CPU Type DualCore Intel Core 2 Duo E8400, 3000 MHz (9 x 333)

Motherboard Name Gigabyte GA-P31-ES3G (3 PCI, 3 PCI-E x1, 1 PCI-E x16, 2 DDR2 DIMM, Audio, Gigabit LAN)

Motherboard Chipset Intel Bearlake G31

System Memory 4096 MB (DDR2-800 DDR2 SDRAM)

Video Adapter AMD Radeon HD 7700 Series (1 GB)

Audio Adapter ATI Radeon HDMI @ AMD Cape Verde/Pitcairn/Curacao/Heathrow/Chelsea/Venus - High Definition Audio Controller

Audio Adapter Realtek ALC888 @ Intel 82801GB ICH7 - High Definition Audio Controller [A-1]

Realtek RTL8168C/8111C PCI-E Gigabit Ethernet Adapter (PHY: Realtek RTL8211/8212) PCI

Sorry for my bad English..