Also, when properly implemented, it's just one configuration option in ones media player. Add some intelligence and FRC is enabled only when content frame or field rate is above half the refresh rate. Like everything in FLOSS, FRC is an _option_, not 'one size fits all' system. Usually those options do their designed work next to perfect (given time to iron out bugs).
CrystalCowboy, you don't have to use 7.5 Hz refresh Just pick 8*7.5=60 (Hz) and run that synchronously... I doubt it is worth it though as eight times 'oversampling' will result in very small jitter and no strong subharmonics.
The following points to a diagram about frame rate resampling:
If one really _really_ wants to understand and picture it all, Octave or Matlab model of square wave sampling will be needed. FFT analysis will show temporal spectrum components nicely. You more mathematically inclined will probably figure everything on paper and in brain too, but I'm not one of those
Any driver or hardware developers lurking here anymore? What do you think about the patches and what has to be done to get them included in the official driver tree? Any chances AMD would do fractional-N type clock synthesizer in GPU firmware? That would be something