They are currently having a system issue, at least that's what it says when you go to their forum: When you have a 60Hz monitor, your actual refresh rate is not 60 but 59,xx. This is why your fps sometimes "drops" to 59. I have that too with some games but it doesn't stutter at all. When you get drops to 58, 57, 56, ... like Brenduis has in his videos, then something indeed isn't right. What I find strange is that not everyone has it. Before the 304.48 driver, it was a known issue but it seems to be fixed for some of us (including me).