On Fri, 11 Oct 2002, Daniel Sheltraw wrote: > I realize this is not really a XF86 question but do you > of any graphics cards with vertical refresh frequencies > greater than 100/sec.
What resolution are you thinking of ? For a graphics card the limit isn't really the vertical refresh rate, but the clock speed. Thus the max vertical refresh rate is the max clock speed divided by the number of timing units (think pixels, but include the off-screen delays when no pixel is being drawn) in the modeline. Consider the modelines: # 640x480 @ 60Hz (Industry standard) hsync: 31.5kHz ModeLine "640x480" 25.2 640 656 752 800 480 490 492 525 -hsync -vsync # 1920x1440 @ 60Hz (VESA) hsync: 90.0kHz ModeLine "1920x1440" 234.0 1920 2048 2256 2600 1440 1441 1444 1500 -hsync +vsync These are both 60Hz vertical refresh. My Matrox G550 has a max clock speed of 360MHz, so the limit would be these modelines: # 640x480 @ 857 Hz ModeLine "640x480" 360.0 640 656 752 800 480 490 492 525 -hsync -vsync # 1920x1440 @ 66.66 Hz ModeLine "1920x1440" 360.0 1920 2048 2256 2600 1440 1441 1444 1500 -hsync +vsync So you could go 8 times as fast as your 100Hz minimum with the right monitor. > Also what monitors or projectors exist to support high refresh rates. Sony have a monitor which does supports 1280x1024@170Hz and one optimized for 1920x1200@98Hz. CRT phospers have a delay-rate; if you try my 640x480 @ 857 Hz mode on a domestic monitor a handful of frames will be blurred together. Why do you want a high refresh rate ? -- Dr. Andrew C. Aitchison Computer Officer, DPMMS, Cambridge [EMAIL PROTECTED] http://www.dpmms.cam.ac.uk/~werdna _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
