i dont see amazaing playback speed up but for example the three way color, ultra key etc.. effects works. and the multi cam is horrible. CPU always runs in high clock speed, somtimes gpu clock speed goes up to 10 %.its not enough, its too slow, lagging.. thanks for help
Sounds like an unbalanced or ill-configured system or you have too high expectations of what hardware MPE can do. Hard to tell without any details supplied. Start with the PPBM5 Benchmark to see where your system is lacking.
http://blogs.adobe.com/premiereprotraining/2011/02/red-yellow-and-gree n-render-bars.html talks about what hardware MPE does, and does not do
Test GeForce GTX 660 - GPU Load 99% (5 layers, PIP and more effects)...