My desktop resolution is 1600x1200 (that's nice for you, I hear).
If I launch the screensaver (which therefore runs at this res) the screen refresh is 1 frame every 5 seconds or so.
If, from the gui, I choose to show graphics, it's perfectly slick. Until... (here's the odd part) I increase the window size above a certain area.
Very roughly, full-screen width and about 80% height is slick. Full-screen height and about 80% width is also slick. But past 80% on the non full-screen axis (i.e. sized to almost full desktop size) the frame rate snaps down to 1 frame every 5 seconds.
Dropping the screen resolution down to, say, 1280x1024 allows full-screen graphics, which makes me think it's a problem with the absolute number of pixels being drawn.
Can anyone replicate this and/or offer any ideas?
Graphics drivers or BOINC? Incidentally, 3d games at 1600x1200 work fine :)