01-11-2011, 04:28 PM | #1 |
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Refresh Rate
I am using this product that uses DisplayLink technology and I have a problem with it.
I have a CRT, a Sony Multiscan20se, and when I plug it directly into my PC, I do use a GeForce GTX 260, I can choose resolutions like 1280x1024 together with a refresh rate of 75 Hz. But when I plug the CRT into the above linked USB to DVI (with the help of a DVI->VGA adapter) I can't choose anything above 60 Hz for any resolution. With one exception, when I use 800x600 I can use 75 Hz. Where this exception comes from is a question for me too. I have tried quite anything that is available in the net about forcing a gpu to show a specific screen refresh rate including editing the EDID but nothing has helped so far. Please help! Last edited by shrippen; 02-22-2011 at 11:51 PM. |
02-19-2011, 05:03 PM | #2 |
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Yes it is true that CRT and LCD refresh rates are not that comparable but that doesn't matter for my problem. My problem is that I can't set the CRTs refresh rate any higher than 60 Hz if I choose a resolution above 800x600. But that doesn't have to do something with the ability of the CRT. When I connect it directly (not via displaylink) to my GPU I can choose 1280x1024 with a refresh rate of 75 Hz.
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02-19-2011, 05:32 PM | #3 |
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I see what you're saying now. You mean the same monitor on both a GPU and DisplayLink shows you different refresh rates. Which monitor is it? Which GPU is it?
It may be a limitation of the DisplayLink technology for the chip in your monitor. DisplayLink works by integrating a GPU inside of the display which decompresses the data sent from your computer over USB. It's very possible the limitation is a driver one or the GPU itself on the monitor. I'm interested to see what the DisplayLink folks have to say. |
02-19-2011, 05:48 PM | #4 |
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It's an old Sony CRT - a Multiscan20se and I am using a GeForce GTX 260
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02-20-2011, 05:33 AM | #5 |
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Are you saying that, upon plugging in the DisplayLink monitor, the CRT's refresh rate changes to 60Hz?
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02-20-2011, 10:35 AM | #6 |
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I am saying that, when I plug in the CRT into displaylink I do not have an option to choose anything higher than 60 Hz in the monitor settings - that is not the case when I plug the monitor directly into my GPU.
I can't answer your question directly because the settings will be different if I switch the crt from the gpu to the displaylink adapter - so yes it will change. |
02-21-2011, 04:45 AM | #7 |
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You should note that you're using a USB to VGA adapter. Only now do I know that. DisplayLink is a technology, not a product.
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02-21-2011, 12:03 PM | #8 |
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Oh, i'm sorry I usually provide all necessary information. Haven't thought of it... sorry!
You are right I use a USB to DVI adapter with an attached DVI to VGA adapater and then comes the CRT. |
02-21-2011, 04:15 PM | #9 |
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Seems like that's an issue right there. I wonder, which product are you using?
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02-21-2011, 04:56 PM | #10 |
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It's one of those Winstar products.
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