My GTX580 is not working with premiere

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I just bought a GTX580 in the hopes of getting faster rendering and exporting.

Premiere says that it's enabled "Mercury playback engine GPU Acce..." But when i export the CPU works instead of the GPU, Any ideas?
Thanks .

 

[COLGeek]

Check this video to enable Mercury playback:

http://www.youtube.com/watch?v=op9a3_MKAV8

 

[paddys09]

I have had to explain this to a few people, but GPU acceleration doesn't really speed up the rendering process in most cases.

It helps with playback, effects and color correction etc. You will notice your pre render times drop significantly....

Its more useful in AE where youre using multiple layers and constantly pre rendering your work....

 

[redcode]

Thanx guys, have a nice day