3x vs 4x IR

[Shonumi]

Yeah, I don't think the stable build should be affected by the regressions JMC47 was talking about, so something is definitely up. For example, Animal Crossing shouldn't give you any problem. Could be a driver issue then. It sounds like you're using MSAA (or a variant) which is traditionally not very taxing in comparison to other AA methods, so something is definitely not OK. Have you tried any other PC games or emulators?