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#1
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Problem with monitor refresh rate
I recently got a new computer (Dell 8400) with a 256 MB nVidia GeForce 6800
video card. The monitor is the Dell M993s 19" CRT. I find that I can not use any refresh rate above 60 Hz. If I set it higher, I have an unacceptable amount of wobbling in the picture. I have tried numerous combinations of resolutions, color settings, and refresh rates, all with the same result. I updated the monitor drivers and am using the latest video card drivers from the nVidia web site (driver 6.6.9.3). Dell even sent me another monitor, with the same result. Any ideas? It seems that there is no reason I should not be able to use a higher refresh rate. The default monitor setting in the monitor documentation is 75 Hz. |
#2
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"medgirl" wrote in message
... I recently got a new computer (Dell 8400) with a 256 MB nVidia GeForce 6800 video card. The monitor is the Dell M993s 19" CRT. I find that I can not use any refresh rate above 60 Hz. If I set it higher, I have an unacceptable amount of wobbling in the picture. I have tried numerous combinations of resolutions, color settings, and refresh rates, all with the same result. I updated the monitor drivers and am using the latest video card drivers from the nVidia web site (driver 6.6.9.3). Dell even sent me another monitor, with the same result. Any ideas? It seems that there is no reason I should not be able to use a higher refresh rate. The default monitor setting in the monitor documentation is 75 Hz. Sounds like a fault video card. If it's all new get dell to fix it. Michael |
#3
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"medgirl" wrote in message
... I recently got a new computer (Dell 8400) with a 256 MB nVidia GeForce 6800 video card. The monitor is the Dell M993s 19" CRT. I find that I can not use any refresh rate above 60 Hz. If I set it higher, I have an unacceptable amount of wobbling in the picture. I have tried numerous combinations of resolutions, color settings, and refresh rates, all with the same result. I updated the monitor drivers and am using the latest video card drivers from the nVidia web site (driver 6.6.9.3). Dell even sent me another monitor, with the same result. Any ideas? It seems that there is no reason I should not be able to use a higher refresh rate. The default monitor setting in the monitor documentation is 75 Hz. All right - I've identified the problem at last, but I would appreciate any suggestions as to how to solve it. I finally moved the monitor, computer, mouse, keyboard, and surge protector to another room, where everything worked perfectly (I should have tried this to start with). Then we tried hooking the computer up with an extension cord to the same plug we had been using before and, again, everything worked perfectly at all refresh rates. Incidentally, the image is much nicer at refresh rates of about 75 Hz or higher. I can definitely tell a difference in comparison to the 60 Hz, though, honestly, I can't distinguish much difference at 75 Hz. Anyway, the problem is clearly something about the location of the computer, but it's a daunting task to try to imagine what specifically is doing this. Any ideas as to the most likely culprits? Is there any way to shield the monitor from other frequencies? |
#4
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On Sun, 19 Dec 2004 13:16:53 -0500, "medgirl"
wrote: "medgirl" wrote in message ... I recently got a new computer (Dell 8400) with a 256 MB nVidia GeForce 6800 video card. The monitor is the Dell M993s 19" CRT. I find that I can not use any refresh rate above 60 Hz. If I set it higher, I have an unacceptable amount of wobbling in the picture. I have tried numerous combinations of resolutions, color settings, and refresh rates, all with the same result. I updated the monitor drivers and am using the latest video card drivers from the nVidia web site (driver 6.6.9.3). Dell even sent me another monitor, with the same result. Any ideas? It seems that there is no reason I should not be able to use a higher refresh rate. The default monitor setting in the monitor documentation is 75 Hz. All right - I've identified the problem at last, but I would appreciate any suggestions as to how to solve it. I finally moved the monitor, computer, mouse, keyboard, and surge protector to another room, where everything worked perfectly (I should have tried this to start with). Then we tried hooking the computer up with an extension cord to the same plug we had been using before and, again, everything worked perfectly at all refresh rates. Incidentally, the image is much nicer at refresh rates of about 75 Hz or higher. I can definitely tell a difference in comparison to the 60 Hz, though, honestly, I can't distinguish much difference at 75 Hz. Anyway, the problem is clearly something about the location of the computer, but it's a daunting task to try to imagine what specifically is doing this. Any ideas as to the most likely culprits? Is there any way to shield the monitor from other frequencies? Potentially EMI near the monitor... you can start by unplugging everything in the immediate vicinity except the system itself and the monitor. That includes speaker and other power supply bricks. Also move speakers several feet away. If you suspect anything in or behind a wall, move monitor as far towards front of desk as possible and note whether it makes a difference. If you had a compass handy you could also put that in the vicinity of the monitor (keeping monitor turned off) and see if it shows anything. |
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