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Monitor Refresh Rates

Post Date: 2007-10-12
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EdH63 View Drop Down
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Posts: 1826 		  Quote EdH63 Quote  Post ReplyReply bullet Topic: Monitor Refresh Rates
    Posted: 12 Oct 2007 at 6:22pm
I'm using this Dell 21" Ultra Sharp FP.  I've had it for around 4 years now and its been, and still is, a great monitor for gaming.  I was wondering though, what refresh rate would you suggest I run this in... 60 or 75?

It defaults at 60 and I see nothing wrong with it, but I've also used it at 75 and see no difference.
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skyR View Drop Down
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Posts: 2220 		  Quote skyR Quote  Post ReplyReply bullet Posted: 12 Oct 2007 at 6:29pm
both are fine. just depends on the person's eyes.

Edited by skyR - 12 Oct 2007 at 6:33pm
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Bill the Cat View Drop Down
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Posts: 1150 		  Quote Bill the Cat Quote  Post ReplyReply bullet Posted: 12 Oct 2007 at 8:35pm
Originally posted by EdH63

It defaults at 60 and I see nothing wrong with it, but I've also used it at 75 and see no difference.
 
60 Hz should be fast enough, but surprisingly (for me anyway) it isn't. My CRT refreshes at 85 Hz, just because it can, but I don't notice the difference between 75 and 85 Hz.
 
It's actually a pretty tricky business and, of course, unrelated to frame rate. The monitor needs to refresh fast enough so that you don't notice the phosphors on the screen flickering when they get repainted with the electron gun and then start to fade before getting painted again. There are different types of phosphors with different decay rates, so some monitors may look flicker free at different refresh rates. Of course, the perception of flicker also varies from individual to individual.
 
You want the monitor phosphors to need refreshing fairly often (decay quickly) otherwise you start to see ghosting in moving objects.
 
Back in the pitch Dark Ages, I worked with a monitor that had a refresh rate of zero. It was either a Techtronics or an HP; I forget. I'm not sure how it worked, but it would paint the screen once, and the phosphors would glow more or less indefinitely. You had to push an "erase" button to clear the screen before changing the display.
 
None of this applies to flat panel displays, of course, where the pixels are just turned on or off as necessary.
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