PROBLEM
If, want ren­der some video, by some cut­ting pro­gram ( Pina­cle, Pre­miere, Sony Vegas) a you want, fast ren­der, you use GPU, but if you check how pow­er is tak­ing from GPU, you find out, that take only ~30%. It is pos­si­ble use over GPU pow­er ? Yes it is. Take me solu­tion below.

RENDERING ~30% GPU 
In here you can see, me GPU proces­sor load, after export me video project, in Win­dows 7.

with this sit­tua­tion, I ren­dered > 720p, 1000 frames, this take about 0:53s
Grpahic Card : ATI HD 5750 {SAPHIRE}

TUNNING
But, if you want to be faster, you have to turn off Trans­paren­cy in AERO mode, in win­dows 7 {I test­ted only in win­dows 7, but it pos­si­ble work in win­dows 8}. Please use this fix

DISABLE TRANSPARENCY

SECOND WAY TO TUNE IT
Sec­ond way, how to tune it is, set per­for­mance to best per­for­mance, please see below.

TEST RENDERING AFTER TUNNING, OR FIXING

with this sit­tua­tion, I ren­dered > 720p, 1000 frames, this take about 0:14s
Grpahic Card : ATI HD 5750 {SAPHIRE}
!!! I TESTED ONLY WITH THIS CARD, FOR CARD ATI R9 280, THIS SOLUTION DON’T WORK !!!