> > How do you know that you're really rendering at 85 fps? > > I've calculate it. My refresh screen is 85Hz, I do a flip command in my main > function... Do you really know that you're rendering with v-sync on? With v-sync off, you can get pretty much any rendering frequency (eg. from 20Hz to 2000Hz :)). Aras Pranckevicius aka NeARAZ http://www.gim.ktu.lt/nesnausk/nearaz/