From: Brian P. <br...@va...> - 2000-11-29 16:12:51
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Ben OShea wrote: > > i have a problem with a atirageRF128 at work... > > > > the card is really fast.. but it seems that the 'rendered' window is under a > > 'stroboscopic' light... > > > > example: gears runs fast, but it seems 'freezed'.... > > the 'gears' seems blocked.. and after few frame seems very slow... > > than again freezed.... > > > i experience the same problem with gears with the mga driver, although > the gears reports 761+ FPS. I don't experience the same problems with > the NVIDIA drivers and my girlfriends TNT2 card and it scores a similar > framerate. If an app's framerate is not synchronized with your monitor's refresh rate you'll sometimes get strobing effects. It's kind of like the illusion of a wagon wheel spinning backward in a movie. Gears is a really simple demo that can render really fast. It is also very regular and cyclic by nature. When it's rendering at hundreds of frames per second it can appear to be running fast, slow, backward or even standing still. Any irregularity in the framerate will look like stuttering or freezing. I think temporal aliasing is the applicable term. I bet that if you resize the windows on your MGA and NVIDIA cards you'll find them acting pretty much the same. -Brian |