Emulator

What steps will reproduce the problem?
1.Using dx11 plugin
2.PLaying mario galaxy
3. with dx9 plugin, if i left mario sleep, i.e not moving him and only watching the screen, after 5 or 6 minutes i get error GFX FIFO:Unknow Opcode (0x47)

What is the expected output? What do you see instead?
When playing with the emulator open for the first time, the game opens and everithing is fine, but when i press stop and want to play again, the "playin screen" goes black (this is on windowed mode 1680 * 1050, haven't tried full screen). An there is another bug, like if i where pressing the button to move mario backwards. With dx9 plugin nothing of this happens.
On the other hand, if i use dx9 plugin, after 5 or 6 minutes of doing nothing, just watching the game, and i mean, moving nothing, i get GFX FIFO:Unknow Opcode (0x47)

Dolphin version with the problem? Other Dolphin version without the
problem?
r5732

32-bit or 64-bit and any other build parameters?
64 bit edition, doesn'0t mather wich options i use on plugin, always i get the same bugs.

OS version and versions of tools/libraries used?
Windows 7 64 bit

Please provide any additional information below.
CPU: Phenom II x4 b55 @ 3.8ghz
GPU: xfx hd 5770 @ 1100 - 1400
RAM: 4gb